Kent A Griffith

University of Michigan, Ann Arbor, Michigan, United States

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Publications (138)626.28 Total impact

  • [Show abstract] [Hide abstract]
    ABSTRACT: Adrenocortical carcinoma (ACC) is a rare malignancy known for high rates of local recurrence, though the benefit of postoperative radiation therapy (RT) has not been established. In this study of grossly resected ACC, we compare local control of patients treated with surgery followed by adjuvant RT to a matched cohort treated with surgery alone. We retrospectively identified patients with localized disease who underwent R0 or R1 resection followed by adjuvant RT. Only patients treated with RT at our institution were included. Matching to surgical controls was on the basis of stage, surgical margin status, tumor grade, and adjuvant mitotane. From 1991 to 2011, 360 ACC patients were evaluated for ACC at the University of Michigan (Ann Arbor, MI). Twenty patients with localized disease received postoperative adjuvant RT. These were matched to 20 controls. There were no statistically significant differences between the groups with regard to stage, margins, grade, or mitotane. Median RT dose was 55 Gy (range, 45-60 Gy). Median follow-up was 34 months. Local recurrence occurred in 1 patient treated with RT, compared with 12 patients not treated with RT (P=.0005; hazard ratio [HR] 12.59; 95% confidence interval [CI] 1.62-97.88). However, recurrence-free survival was no different between the groups (P=.17; HR 1.52; 95% CI 0.67-3.45). Overall survival was also not significantly different (P=.13; HR 1.97; 95% CI 0.57-6.77), with 4 deaths in the RT group compared with 9 in the control group. Postoperative RT significantly improved local control compared with the use of surgery alone in this case-matched cohort analysis of grossly resected ACC patients. Although this retrospective series represents the largest study to date on adjuvant RT for ACC, its findings need to be prospectively confirmed. Copyright © 2015 Elsevier Inc. All rights reserved.
    International journal of radiation oncology, biology, physics 03/2015; DOI:10.1016/j.ijrobp.2015.01.007 · 4.59 Impact Factor
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    ABSTRACT: To characterize the adoption and variation of intensity-modulated radiation therapy (IMRT) use in the state of Michigan. As a certificate-of-need state, Michigan requires every radiation oncology facility to report the number of external-beam and IMRT treatments delivered annually. We examined the percentage of treatments delivered using IMRT across centers from 2005 to 2012. We constructed a repeated-measures longitudinal linear regression model to evaluate bivariable and multiple variable associations with IMRT use. The median proportion of treatments delivered with IMRT rose from 16% in 2005 to 42% in 2012. All treatment centers in the state of Michigan possessed the capacity to deliver IMRT as of 2009. The fraction of treatments delivered with IMRT varied between 23% and 96% (standard deviation, 19%) in the lowest- and highest-use centers in 2012. Higher IMRT use was significantly associated with freestanding facilities and year of treatment, with a trend toward higher IMRT use in academic centers and low-volume facilities. IMRT use grew significantly across the state of Michigan over time, with four-fold variability among centers, which was related to facility characteristics. These data provide no indication of an ideal or appropriate level of IMRT use. Rather, the wide variation in IMRT use among centers indicates a lack of consensus regarding the situations in which IMRT provides significant clinical benefit. This supports further research and interventions to ensure that patients receive appropriate care, regardless of where they are treated. Copyright © 2015 by American Society of Clinical Oncology.
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    ABSTRACT: Phase I trials often include a dose expansion cohort (DEC), in which additional patients are treated at the estimated maximum tolerated dose (MTD) after dose escalation, with the goal of ensuring that data are available from more than six patients at a single dose level. However, protocols do not always detail how, or even if, the additional toxicity data will be used to reanalyze the MTD or whether observed toxicity in the DEC will warrant changing the assigned dose. A DEC strategy has not been statistically justified. We conducted a simulation study of two phase I designs: the "3+3" and the Continual Reassessment Method (CRM). We quantified how many patients are assigned the true MTD using a 10 to 20 patient DEC and how a sensible reanalysis using the DEC changes the probability of selecting the true MTD. We compared these results with those from an equivalently sized larger CRM that does not include a DEC. With either the 3+3 or CRM, reanalysis with the DEC increased the probability of identifying the true MTD. However, a large CRM without a DEC was more likely to identify the true MTD while still treating 10 or 15 patients at this dose level. Where feasible, a CRM design with no explicit DEC is preferred to designs that fix a dose for all patients in a DEC. © The Author 2015. Published by Oxford University Press. All rights reserved. For Permissions, please e-mail: journals.permissions@oup.com.
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    ABSTRACT: Given evidence from randomized trials that have established the non-inferiority of more convenient and less costly courses of hypofractionated radiotherapy to the whole breast in selected breast cancer patients who receive lumpectomy, we sought to investigate the use of hypofractionated radiation therapy and factors associated with its use in a consortium of radiation oncology practices in Michigan. We sought to determine the extent to which variation in use occurs at the physician or practice level versus the extent to which use reflects individualization based on potentially relevant patient characteristics (such as habitus, age, chemotherapy receipt, or laterality). We evaluated associations between receipt of hypofractionated radiation therapy and various patient, provider, and practice characteristics in a multilevel model. Of 1477 patients who received lumpectomy and whole-breast radiation therapy and were registered by the Michigan Radiation Oncology Quality Consortium (MROQC) from October 2011 to December 2013, 913 had T1-2, N0 breast cancer. Of these 913, 283 (31%) received hypofractionated radiation therapy. Among the 13 practices, hypofractionated radiation therapy use ranged from 2% to 80%. On multilevel analysis, 51% of the variation in the rate of hypofractionation was attributable to the practice level, 21% to the provider level, and 28% to the patient level. On multivariable analysis, hypofractionation was more likely in patients who were older (odds ratio [OR] 2.16 for age ≥50 years, P=.007), less likely in those with larger body habitus (OR 0.52 if separation between tangent entry and exit ≥25 cm, P=.002), and more likely without chemotherapy receipt (OR 3.82, P<.001). Hypofractionation use was not higher in the last 6 months analyzed: 79 of 252 (31%) from June 2013 to December 2013 and 204 of 661 (31%) from October 2011 to May 2013 (P=.9). Hypofractionated regimens of whole-breast radiation therapy have been variably administered in the adjuvant setting in Michigan after the publication of long-term trial results and consensus guidelines. Most of this variability is explained at the practice and provider level rather than by patient-level features, although care is being individualized to some degree. Copyright © 2014 Elsevier Inc. All rights reserved.
    International journal of radiation oncology, biology, physics 12/2014; 90(5):1010-6. DOI:10.1016/j.ijrobp.2014.09.027 · 4.59 Impact Factor
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    ABSTRACT: Purpose: Endocrine therapy (ET) fails to induce a response in one-half of patients with hormone receptor (HR) positive metastatic breast cancer (MBC) and almost all will eventually become refractory to ET. Circulating Tumor Cells (CTC) are associated with worse prognosis in MBC patients, but enumeration alone is insufficient to predict the absolute odds of benefit from any therapy, including ET. We developed a multi-parameter CTC-Endocrine Therapy Index (CTC-ETI), which we hypothesize may predict resistance to ET in patients with HR positive MBC. Experimental Design: The CTC-ETI combines enumeration and CTC expression of four markers: estrogen receptor (ER), B-cell lymphoma 2 (BCL-2), Human Epidermal Growth Factor Receptor 2 (HER2), and Ki67. The CellSearch® System and reagents were used to capture CTC and measure protein expression by immunofluorescent staining on CTC. Results: The feasibility of determining CTC-ETI was initially established in vitro and then in a prospective single-institution pilot study in MBC patients. CTC-ETI was successfully determined in 44/50 (88%) patients. Eighteen (41%), 9 (20%), and 17 (39%) patients had low, intermediate, and high CTC-ETI scores, respectively. Inter-observer concordance of CTC-ETI determination was 94-95% (Kappa statistic 0.90-0.91). Inter- and cell-to-cell intra-patient heterogeneity of expression of each of the CTC-markers was observed. CTC biomarker expression was discordant from both primary and metastatic tissue. Conclusions: CTC expression of ER, BCL-2, HER2, and Ki67 can be reproducibly measured with high analytical validity using the CellSearch® System. The clinical implications of CTC-ETI, and of the heterogeneity of CTC-biomarker expression, are being evaluated in an ongoing prospective trial.
    Clinical Cancer Research 11/2014; DOI:10.1158/1078-0432.CCR-14-1913 · 8.19 Impact Factor
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    ABSTRACT: Background: The hedgehog (HH) signaling pathway is a key regulator in tumorigenesis of pancreatic adenocarcinoma (PDA) and is up-regulated in PDA cancer stem cells (CSCs). GDC-0449 is an oral small-molecule inhibitor of HH pathway. This study assessed the effect of GDC-0449-mediated HH inhibition in paired biopsies, followed by combined treatment with gemcitabine, in patients with metastatic PDA. Methods: Twenty-five patients were enrolled of which 23 underwent core biopsies at baseline and following 3 weeks of GDC-0449. On day 29, 23 patients started weekly gemcitabine while continuing GDC-0449. We evaluated GLI1 and PTCH1 inhibition, change in CSCs, Ki-67, fibrosis, and assessed tumor response, survival and toxicity. Results: On pre-treatment biopsy, 75% patients had elevated sonic hedgehog (SHH) expression. On post-treatment biopsy, GLI1 and PTCH1 decreased in 95.6% and 82.6% of 23 patients, fibrosis decreased in 45.4% of 22 and Ki-67 in 52.9% of 17 evaluable patients. No significant changes were detected in CSCs pre- and post-biopsy. The median progression-free and overall survival for all treated patients was 2.8 and 5.3 months. The response and disease control rate was 21.7% and 65.2%. No significant correlation was noted between CSCs, fibrosis, SHH, Ki-67, GLI1, PTCH1 (baseline values, or relative change on post-treatment biopsy) and survival. Grade >3 adverse events were noted in 56% patients. Conclusion: We show that GDC-0449 for 3 weeks leads to down-modulation of GLI1 and PTCH1, without significant changes in CSCs compared to baseline. GDC-0449 and gemcitabine was not superior to gemcitabine alone in the treatment of metastatic pancreatic cancer.
    Clinical Cancer Research 10/2014; DOI:10.1158/1078-0432.CCR-14-1269 · 8.19 Impact Factor
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    ABSTRACT: Purpose To determine the health-related quality of life (QOL) during and after neoadjuvant chemoradiation therapy and surgery for patients with pancreatic adenocarcinoma. Methods and Materials Participants of a prospective, phase 2 multi-institutional trial treated with neoadjuvant chemoradiation followed by surgery completed QOL questionnaires (European Organization for Research and Treatment in Cancer Quality of Life Questionnaire version 3.0 [EORTC-QLQ C30], EORTC-Pancreatic Cancer module [EORTC-PAN 26], and Functional Assessment of Cancer Therapy Hepatobiliary and Pancreatic subscale [FACT-Hep]) at baseline, after 2 cycles of neoadjuvant therapy, after surgery, at 6 months from initiation of therapy, and at 6-month intervals for 2 years. Mean scores were compared with baseline. A change >10% was considered a minimal clinically important difference. Results Of 71 participants in the trial, 55 were eligible for QOL analysis. Compliance ranged from 32% to 74%. The EORTC-QLQ C30 global QOL did not significantly decline after neoadjuvant therapy, whereas the Functional Assessment of Cancer Therapy global health measure showed a statistically, but not clinically significant decline (−8, P=.02). This was in parallel with deterioration in physical functioning (−14.1, P=.001), increase in diarrhea (+16.7, P=.044), and an improvement in pancreatic pain (−13, P=.01) as per EORTC-PAN 26. Because of poor patient compliance in the nonsurgical group, long-term analysis was performed only from surgically resected participants (n=36). Among those, global QOL returned to baseline levels after 6 months, remaining near baseline through the 24-month visit. Conclusions The study regimen consisting of 2 cycles of neoadjuvant therapy was completed without a clinically significant QOL deterioration. A transient increase in gastrointestinal symptoms and a decrease in physical functioning were seen after neoadjuvant chemoradiation. In those patients who underwent surgical resection, most domains returned back to baseline levels by 6 months.
    International journal of radiation oncology, biology, physics 10/2014; 90(2). DOI:10.1016/j.ijrobp.2014.05.053 · 4.59 Impact Factor
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    ABSTRACT: Resources, including space, equipment, funding, personnel, and protected time, are essential in academic medical careers. Negotiation often plays a key role in the distribution of these resources.
    Journal of General Internal Medicine 08/2014; DOI:10.1007/s11606-014-2988-5 · 3.42 Impact Factor
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    ABSTRACT: Objective Peer reviewers’ knowledge of author identity may influence review content, quality, and recommendations. Therefore, the International Journal of Radiation Oncology, Biology, Physics (Red Journal), the official journal of the American Society for Radiation Oncology, implemented double-blind peer review in 2011. Because previous studies of blinding efficacy have tended to consider larger disciplines than radiation oncology, in which preliminary research findings are often presented at conferences and a small group of investigators serves as the pool of authors and reviewers on any given topic, we sought to evaluate the efficacy of blinding, as well as attitudes toward the new policy. Design Between May and August 2012, all Red Journal corresponding authors and reviewers completed a questionnaire regarding demographics, attitudes, and perceptions of success of blinding. Results Authors (n=408) were more likely to be female than reviewers (n=519): 32% v 20% (P <.001). Authors were less likely to hold senior academic positions (18% full professors, 16% associate professors) than reviewers (32% full professors, 25% associate professors, P<.001). Many reviewers (43%) had been reviewing for more than 10 years. Respondent attitudes are detailed in Table 26 : only 13% of authors believed the reviewers should be informed of their identities, and 21% believed they should know the identities of their reviewers. In 603 reviews, reviewers believed they could identify the author in 19% and suspected in 31%; believed they knew the institution(s) from which the paper originated in 23% and suspected in 34%. In the 301 cases when a reviewer believed he or she knew or suspected author identity, 42% indicated that prior presentations served as a clue, and 57% indicated that literature referenced did so. Of those who believed they knew or suspected origin and provided details (n=133), 13% were entirely incorrect (provided details but correctly identified neither author nor institution). Conclusions In a small specialty where preliminary research presentations are common and occur in a limited number of venues, reviewers are often familiar with research findings and suspect author identity even when manuscript review is blinded. Nevertheless, blinding appears to be effective in many cases, and support for continuing blinding was strong from both authors and reviewers.
    International Journal of Radiation OncologyBiologyPhysics 08/2014; 89(5). DOI:10.1016/j.ijrobp.2014.04.021 · 4.18 Impact Factor
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    ABSTRACT: Purpose To describe voice and speech quality changes and their predictors in patients with locally advanced oropharyngeal cancer treated on prospective clinical studies of organ-preserving chemotherapy–intensity modulated radiation therapy (chemo-IMRT). Methods and Materials Ninety-one patients with stage III/IV oropharyngeal cancer were treated on 2 consecutive prospective studies of definitive chemoradiation using whole-field IMRT from 2003 to 2011. Patient-reported voice and speech quality were longitudinally assessed from before treatment through 24 months using the Communication Domain of the Head and Neck Quality of Life (HNQOL-C) instrument and the Speech question of the University of Washington Quality of Life (UWQOL-S) instrument, respectively. Factors associated with patient-reported voice quality worsening from baseline and speech impairment were assessed. Results Voice quality decreased maximally at 1 month, with 68% and 41% of patients reporting worse HNQOL-C and UWQOL-S scores compared with before treatment, and improved thereafter, recovering to baseline by 12-18 months on average. In contrast, observer-rated larynx toxicity was rare (7% at 3 months; 5% at 6 months). Among patients with mean glottic larynx (GL) dose ≤20 Gy, >20-30 Gy, >30-40 Gy, >40-50 Gy, and >50 Gy, 10%, 32%, 25%, 30%, and 63%, respectively, reported worse voice quality at 12 months compared with before treatment (P=.011). Results for speech impairment were similar. Glottic larynx dose, N stage, neck dissection, oral cavity dose, and time since chemo-IMRT were univariately associated with either voice worsening or speech impairment. On multivariate analysis, mean GL dose remained independently predictive for both voice quality worsening (8.1%/Gy) and speech impairment (4.3%/Gy). Conclusions Voice quality worsening and speech impairment after chemo-IMRT for locally advanced oropharyngeal cancer were frequently reported by patients, underrecognized by clinicians, and independently associated with GL dose. These findings support reducing mean GL dose to as low as reasonably achievable, aiming at ≤20 Gy when the larynx is not a target.
    International journal of radiation oncology, biology, physics 08/2014; 89(5). DOI:10.1016/j.ijrobp.2014.03.013 · 4.59 Impact Factor
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    ABSTRACT: Although worry about recurrence is a persistent concern among breast cancer survivors, little is known about physicians' confidence about presenting recurrence risk information, identifying women with considerable worry, and helping women manage worry.
    Psycho-Oncology 07/2014; DOI:10.1002/pon.3625 · 4.04 Impact Factor
  • Haematologica 06/2014; 99(9). DOI:10.3324/haematol.2014.110395 · 5.94 Impact Factor
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    ABSTRACT: Purpose To report the final cosmetic results from a single-arm prospective clinical trial evaluating accelerated partial breast irradiation (APBI) using intensity modulated radiation therapy (IMRT) with active-breathing control (ABC). Methods and Materials Women older than 40 with breast cancer stages 0-I who received breast-conserving surgery were enrolled in an institutional review board-approved prospective study evaluating APBI using IMRT administered with deep inspiration breath-hold. Patients received 38.5 Gy in 3.85-Gy fractions given twice daily over 5 consecutive days. The planning target volume was defined as the lumpectomy cavity with a 1.5-cm margin. Cosmesis was scored on a 4-category scale by the treating physician. Toxicity was scored according to National Cancer Institute Common Terminology Criteria for Adverse Events (CTCAE version 3.0). We report the cosmetic and toxicity results at a median follow-up of 5 years. Results A total of 34 patients were enrolled. Two patients were excluded because of fair baseline cosmesis. The trial was terminated early because fair/poor cosmesis developed in 7 of 32 women at a median follow-up of 2.5 years. At a median follow-up of 5 years, further decline in the cosmetic outcome was observed in 5 women. Cosmesis at the time of last assessment was 43.3% excellent, 30% good, 20% fair, and 6.7% poor. Fibrosis according to CTCAE at last assessment was 3.3% grade 2 toxicity and 0% grade 3 toxicity. There was no correlation of CTCAE grade 2 or greater fibrosis with cosmesis. The 5-year rate of local control was 97% for all 34 patients initially enrolled. Conclusions In this prospective trial with 5-year median follow-up, we observed an excellent rate of tumor control using IMRT-planned APBI. Cosmetic outcomes, however, continued to decline, with 26.7% of women having a fair to poor cosmetic result. These results underscore the need for continued cosmetic assessment for patients treated with APBI by technique.
    International journal of radiation oncology, biology, physics 05/2014; 89(1). DOI:10.1016/j.ijrobp.2014.01.005 · 4.59 Impact Factor
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    ABSTRACT: ABSTRACT Radioimmunotherapy (RIT) is effective treatment for indolent non-Hodgkin's lymphomas (NHL), but response durations are usually limited, especially in aggressive NHL. We hypothesized that administration of bortezomib as a radiosensitizer with RIT would be tolerable and improve efficacy in NHL. This Phase 1 dose escalation study evaluated escalating doses of bortezomib combined with (131)I-tositumomab in patients with relapsed/refractory NHL. Twenty-five patients were treated. Treatment was well tolerated, with primarily hematologic toxicity. Maximum tolerated dose (MTD) was determined to be 0.9 mg/m(2) bortezomib, in combination with standard dose of 75 cGy (131)I-tositumomab. Sixteen patients responded (64%), including 44% complete responses (CR), with 82% CR in follicular lymphoma (FL) patients. At median follow up of 7 months, median progression-free survival was 7 months, and 7 of 11 FL patients remained in remission at a median of 22 months. In conclusion, bortezomib can be safely administered in combination with (131)I-tositumomab with promising response rates.
    Leukemia & lymphoma 04/2014; 56(2). DOI:10.3109/10428194.2014.914195 · 2.61 Impact Factor
  • Cancer Research 04/2014; 72(14 Supplement):A40-A40. DOI:10.1158/1538-7445.PANCA2012-A40 · 9.28 Impact Factor
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    ABSTRACT: To evaluate the financial experiences of a racially and ethnically diverse cohort of long-term breast cancer survivors (17% African American, 40% Latina) identified through population-based registries. Longitudinal study of women diagnosed with nonmetastatic breast cancer in 2005 to 2007 and reported to the SEER registries of metropolitan Los Angeles and Detroit. We surveyed 3,133 women approximately 9 months after diagnosis and 4 years later. Multivariable models evaluated correlates of self-reported decline in financial status attributed to breast cancer and of experiencing at least one type of privation (economically motivated treatment nonadherence and broader hardships related to medical expenses). Among 1,502 patients responding to both surveys, median out-of-pocket expenses were ≤ $2,000; 17% of respondents reported spending > $5,000; 12% reported having medical debt 4 years postdiagnosis. Debt varied significantly by race: 9% of whites, 15% of blacks, 17% of English-speaking Latinas, and 10% of Spanish-speaking Latinas reported debt (P = .03). Overall, 25% of women experienced financial decline at least partly attributed to breast cancer; Spanish-speaking Latinas had significantly increased odds of this decline relative to whites (odds ratio [OR], 2.76; P = .006). At least one privation was experienced by 18% of the sample; blacks (OR, 2.6; P < .001) and English-speaking Latinas (OR, 2.2; P = .02) were significantly more likely to have experienced privation than whites. Racial and ethnic minority patients appear most vulnerable to privations and financial decline attributable to breast cancer, even after adjustment for income, education, and employment. These findings should motivate efforts to control costs and ensure communication between patients and providers regarding financial distress, particularly for vulnerable subgroups.
    Journal of Clinical Oncology 03/2014; 32(12). DOI:10.1200/JCO.2013.53.0956 · 17.88 Impact Factor
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    ABSTRACT: Female physician-researchers do not achieve career success at the same rate as men. Differences in nonprofessional responsibilities may partially explain this gap. To investigate the division of domestic labor by gender in a motivated group of early-career physician-researchers. Nationwide postal survey between 2010 and 2011. United States. Physician recipients of National Institutes of Health K08 or K23 awards between 2006 and 2009 with active academic affiliation at the time of the survey. Time spent on parenting and domestic tasks was determined through self-report. Among married or partnered respondents with children, a linear regression model of time spent on domestic activities was constructed considering age, gender, race, specialty, MD or MD/PhD status, age of youngest child, number of children, work hours, K award type, and spousal employment. A 74% response rate was achieved, and 1049 respondents were academic physicians. Women were more likely than men to have spouses or domestic partners who were employed full-time (85.6% [95% CI, 82.7% to 89.2%] vs. 44.9% [CI, 40.8% to 49.8%]). Among married or partnered respondents with children, after adjustment for work hours, spousal employment, and other factors, women spent 8.5 more hours per week on domestic activities. In the subgroup with spouses or domestic partners who were employed full-time, women were more likely to take time off during disruptions of usual child care arrangements than men (42.6% [CI, 36.6% to 49.0%] vs. 12.4% [CI, 5.4% to 19.5%]). Analyses relied on self-reported data. The study design did not enable investigation of the relationship between domestic activities and professional success. In this sample of career-oriented professionals, gender differences in domestic activities existed among those with children. Most men's spouses or domestic partners were not employed full-time, which contrasted sharply with the experiences of women. National Institutes of Health.
    Annals of internal medicine 03/2014; 160(5). DOI:10.7326/M13-0974 · 16.10 Impact Factor
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    ABSTRACT: Physician attitudes toward and lack of familiarity with guidelines have been identified as potential barriers to adherence in general, but little is known about their attitudes toward and use of cancer management guidelines specifically. This study surveyed 1500 surgeons and medical oncologists drawn from the AMA Masterfile in 2012. This report describes and compares the attitudes of medical oncologists and surgeons who treat patients with breast cancer regarding guidelines in general and the NCCN Clinical Practice Guidelines in Oncology (NCCN Guidelines) in particular, and their familiarity, use, and compliance with these guidelines. Of 896 respondents, responses were analyzed from the 766 who had seen at least one new patient with breast cancer in the past year. Mean participant age was 52 years; 25% worked in a teaching setting. Attitudes toward guidelines were generally favorable. Medical oncologists were more likely than surgeons to be aware that NCCN issues guidelines for cancer management (100% vs 74%; P<.001) and more likely to state that these guidelines generally influence their decisions (96% vs 70%; P<.001). Among those aware of NCCN Guidelines, 96% reported that they often agreed with NCCN recommendations, and 75% reported that almost all of their breast cancer treatment recommendations were consistent with these guidelines. Still, most providers (77%) also reported that they refer one-fourth or fewer of their patients with breast cancer to the NCCN Guidelines for Patients. Attitudes toward physician-directed cancer management guidelines are generally positive, and they are frequently used. However, existing guidelines seem to have greater visibility to the medical oncology audience than to surgeons, and patient versions are infrequently recommended.
    Journal of the National Comprehensive Cancer Network: JNCCN 02/2014; 12(2):204-12. · 4.24 Impact Factor
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    ABSTRACT: Aromatase inhibitors (AI), which are used to treat breast cancer, inhibit estrogen production in postmenopausal women. AI-associated musculoskeletal symptoms (AIMSS) occur in approximately half of treated women, and lead to treatment discontinuation in 20-30%. The etiology may be due in part to estrogen deprivation. In premenopausal women, lower estrogen levels have been associated with increased pain, as well as with impairment of descending pain inhibitory pathways, which may be a risk factor for developing chronic pain. We prospectively tested whether AI-induced estrogen deprivation alters pain sensitivity, thereby increasing the risk of developing AIMSS. Fifty postmenopausal breast cancer patients underwent pressure pain testing and conditioned pain modulation (CPM) assessment prior to AI initiation and after 3 and 6 months. At baseline, 26 of 40 (65%) assessed patients demonstrated impaired CPM, which was greater in those who had previously received chemotherapy (p=0.006). No statistically significant change in pressure pain threshold or CPM was identified following estrogen deprivation. In addition, there was no association with either measure of pain sensitivity and change in patient-reported pain with AI therapy. AIMSS are not likely due to decreased pain threshold or impaired CPM prior to treatment initiation, or to effects of estrogen depletion on pain sensitivity. Clinicaltrials.gov NCT01814397. This article presents our findings of the effect of estrogen deprivation on objective measures of pain sensitivity. In postmenopausal women, medication-induced estrogen depletion did not result in an identifiable change in pressure pain threshold or conditioned pain modulation. Impaired conditioned pain modulation may be associated with chemotherapy.
    The journal of pain: official journal of the American Pain Society 01/2014; DOI:10.1016/j.jpain.2014.01.487 · 4.22 Impact Factor
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    ABSTRACT: To explore aspects of mentoring that might influence medical faculty career satisfaction and to discover whether there are gender differences. In 2010-2011, the authors surveyed 1,708 clinician-researchers who received (in 2006-2009) National Institutes of Health K08 and K23 awards, which provided mentoring for career development. The authors compared, by gender, the development and nature of mentoring relationships, mentor characteristics, extent of mentoring in various mentor roles, and satisfaction with mentoring. They evaluated associations between mentoring and career satisfaction using multivariable linear regression analysis. The authors received 1,275 responses (75% response rate). Of these respondents, 1,227 (96%) were receiving K award support at the time and constituted the analytic sample. Many respondents had > 1 designated mentor (440/558 women, 79%; 410/668 men, 61%; P < .001). Few were dissatisfied with mentoring (122/1,220, 10.0%; no significant gender difference). Career dissatisfaction was generally low, but 289/553 women (52%) and 268/663 men (40%) were dissatisfied with work-life balance (P < .001). Time spent meeting or communicating with the mentor, mentor behaviors, mentor prestige, extent of mentoring in various roles, and collegiality of the mentoring relationship were significantly associated with career satisfaction. Mentor gender, gender concordance of the mentoring pair, and number of mentors were not significantly associated with satisfaction. This study of junior faculty holding mentored career development awards showed strong associations between several aspects of mentoring and career satisfaction, indicating that those concerned about faculty attrition from academic medicine should consider mentor training and development.
    Academic medicine: journal of the Association of American Medical Colleges 12/2013; DOI:10.1097/ACM.0000000000000109 · 2.34 Impact Factor

Publication Stats

3k Citations
626.28 Total Impact Points

Institutions

  • 2001–2015
    • University of Michigan
      • • Department of Biostatistics
      • • Department of Radiation Oncology
      Ann Arbor, Michigan, United States
  • 2003–2013
    • Concordia University–Ann Arbor
      Ann Arbor, Michigan, United States