Clinical and investigative medicine. Medecine clinique et experimentale (Clin Investig Med)

Publisher: Canadian Medical Association; Canadian Society for Clinical Investigation, Canadian Society for Clinical Investigation

Current impact factor: 1.23

Impact Factor Rankings

2015 Impact Factor Available summer 2016
2014 Impact Factor 1.227

Additional details

5-year impact 1.29
Cited half-life 7.50
Immediacy index 0.08
Eigenfactor 0.00
Article influence 0.39
Website Clinical and Investigative Medicine website
Other titles Clinical and investigative medicine (Online), Clinical and investigative medecine, CIM, Médicine clinique et experimentale
ISSN 1488-2353
OCLC 44653587
Material type Document, Periodical, Internet resource
Document type Internet Resource, Computer File, Journal / Magazine / Newspaper

Publisher details

Canadian Society for Clinical Investigation

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Publications in this journal

  • [Show abstract] [Hide abstract]
    ABSTRACT: Our study is designed to examine the diagnostic performance of diffusion-weighted magnetic resonance imaging (DW-MRI) for bladder cancers (BC), and to determine whether DW-MRI can differentiate muscle invasive bladder cancer (MIBC) from non-MIBC (NMIBC). A meta-analysis was performed of published studies that investigated the performance of DW-MRI for BC. These studies were retrieved from scientific literature databases using sensitive electronic search strategies. The STATA 12.0 and Meta-disc software were employed for statistical analyses of data extracted from selected studies. Our search initially returned 230 articles, of which 11 met the inclusion criteria and were enrolled into the final meta-analysis. Five of the included studies reported the diagnostic performance of DW-MRI for BC with a cumulative total of 243 BC patients and 82 healthy subjects. Eight studies investigated the diagnostic performance of DW-MRI for differentiating MIBC from NMIBC, involving 259 MIBC lesions and 515 NMIBC lesions. Meta-analysis results were as follows: the diagnostic performance of DW-MRI for BC (sensitivity: 0.95 [0.75-0.99]; specificity: 0.85 [0.74-0.92]; positive likelihood ratio: 6.45 [3.64-11.42]; negative likelihood ratio: 0.055 [0.009-0.333]; diagnostic odds ratio: 117.11 [19.37-708.05]; area under the curve (AUC): 0.91); the diagnostic performance of DW-MRI to differentiate MIBC from NMIBC (sensitivity: 0.85 [0.76 - 0.91]; specificity: 0.90 [0.87 - 0.93]; positive likelihood ratio:8.81[6.43 - 12.07]; negative likelihood ratio: 0.16 [0.10 - 0.28]; diagnostic odds ratio: 53.95 [25.68 - 113.33]; AUC: 0.92). DW-MRI has an outstanding diagnostic performance, with advanced sensitivity and specificity, for imaging of bladder cancers and for differentiating MIBC from NMIBC.
    Clinical and investigative medicine. Medecine clinique et experimentale 08/2015; 38(4):E173-84.
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    ABSTRACT: Turgut Ozal University Scientific Research Committee (TOBAT) was established in Turgut Ozal University Faculty of Medicine in 2009 to encourage young medical students and scientists to carry out novel scientific research in addition to their medical education in order to 1) establish a platform of informing the latest advancements in science, 2) present this work to colleagues and 3) meet and interact with their peers within the international medical and scientific community. Our committee annually organizes Turkey's most highly-qualified medical student congress with the highest number of presenters and attendants, the International Medical Student Congress (IMSC). Over 1,500 medical students and experts attend our congress to present, learn and discuss new research in medicine. Medical students from all over Turkey present the results from their scientific work of the previous year. Because of the international nature of this congress, experts, scientists and attendants from other countries enrich the content and atmosphere of the congress. We also invite successful students who have trained in their own countries and who are interested in science and medicine. Students from abroad present their splendid work and also strengthen the global student network. The congress is covered by the media, both print and television, and has a positive impact on public opinion. The conference organization, design and coordination and the configuration of the scientific program are completed by Turgut Ozal University's medical students with the assistance of their supervisors; which is a success in itself. Research and scientific work performed by students compose the main portion of the congress. The latest congress included 161 oral and 74 posters presentations. The topics covered by these presentations often show the promise of playing an important role in the future of medical research. Over the past years, topics have included the following: "CRISPR/Cas9 system": its utilities and its possible applications, especially for tuberculosis infection; the use of synthetic biology to re-program heart coronary arteries for "the rapid treatment of myocardial infarction"; tissue engineering and its novel approaches; and, a state-of-art method for "the colon cancer therapy by using synthetic gut flora". This year, for the first time, we have included a very important opportunity for the congress attendees: 20 studies of the participating scientific presentations have been selected to be published in this supplementary of the Journal of Clinical and Investigative Medicine, a journal cited in SCI and PubMed database. We believe that this opportunity has encouraged the young scientists to improve their research skills, to carry out better and more novel studies and to collaborate for effectively with each other. The selection was difficult because of the high quality of the scientific research. In this supplementary, you will find several well-documented studies on different topics including the genetic roots of Alzheimer's disease related to the clusterin gene, novel approaches for cancer stem cell, a novel reporter protein to be used in lab as an alternative to GFP, the effects of traditional moving dry cupping therapy on sleep quality and shoulder-neck pain and the inhibition of gram negative E.coli by LALF-secreting engineered gram positive B. subtilis. By seeing the quality and breadth of these topics, the contributions and potential impact of our congress to the scientific community can be better understood. We wish to express our sincere appreciation to the editors of the Journal of Clinical and Investigative Medicine for their editing and their support in publishing this supplementary material. We would like also to take this opportunity to thank the Rector of Turgut Ozal University, the Dean of Faculty of Medicine, our instructors, mentors, seniors, advisors and technical staff for their kind advice and assistance in organizing this huge undertaking. Kind regards, Mustafa Semih Elitok on behalf of Turgut Ozal University Scientific Research Committee (TOBAT).
    Clinical and investigative medicine. Medecine clinique et experimentale 08/2015; 38(4):E185-E273.
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    ABSTRACT: Cardiopulmonary bypass (CPB) is commonly associated with a systemic inflammatory response that may lead to severe complications. Classic signs of systemic inflammatory response syndrome are complement activation and changes in cytokine and acute phase reactant levels. The effects of rosuvastatin after CPB on interleukin-6 (IL-6), interleukin-10 (IL-10), interleukin-18 (IL-18) and High Sensitivity C-Reactive Protein (hs-CRP) levels were investigated. Thirty-seven male and thirteen female patients (total=50) aged 42 to 78 years, who had coronary bypass surgery due to coronary artery disease were randomly divided into two groups. The 25 patients in the control group were administered placebos. The 25 in the treatment group were administered 20 mg rosuvastatin tablets daily between preoperative day 7 and postoperative day 28. Blood samples were taken at six time points; before induction of anesthesia (T1), during CPB (T2), five minutes after removal of cross clamp (T3), after protamine infusion (T4), postoperative day three (T5) and postoperative day 28 (T6). Data points were expressed as mean ± standard deviation (SD). Rosuvastatin lowered IL-6 levels at T4, T5 and T6 time points (T4, T5, T6 p < 0.05), and elevated IL-10 levels at T3 and T4 (T3, T4 p < 0.05). IL-18 levels were also elevated at multiple time points. Rosuvastatin also lowered hs-CRP levels and cholesterol levels at T6 (p < 0.05). Administering 20 mg/day of rosuvastatin between preoperative day 7 and postoperative day 28 may result in fewer complications in certain (especially intraoperative) cases of systemic inflammatory response caused by the CPB technique used in coronary bypass surgery.
    Clinical and investigative medicine. Medecine clinique et experimentale 08/2015; 38(4):E154-63.
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    ABSTRACT: The Canadian Society of Clinician Investigators (CSCI) and Clinical Investigator Trainee Association of Canada/Association des cliniciens-chercheurs en formation du Canada (CITAC/ACCFC) annual general meeting (AGM) was held in Toronto during November 21-24, 2015 for the first time in conjunction with the University of Toronto Clinician-Investigator Program Research Day. The overall theme for this year's meeting was the role of mentorship in career development, with presentations from Dr. Chaim Bell (University of Toronto), Dr. Shurjeel Choudhri (Bayer Healthcare), Dr. Ken Croitoru (University of Toronto), Dr. Astrid Guttman (University of Toronto), Dr. Prabhat Jha (University of Toronto) and Dr. Sheila Singh (McMaster University). The keynote speakers of the 2014 AGM included Dr. Qutayba Hamid, who was presented with the Distinguished Scientist Award, Dr. Ravi Retnakaran, who was presented with the Joe Doupe Award, and Dr. Lorne Babiuk, who was the CSCI-RCPSC Henry Friesen Award winner. The highlight of the conference was, once again, the outstanding scientific presentations from the numerous clinician investigator (CI) trainees from across the country who presented at the Young Investigators' Forum. Their research topics spanned the diverse fields of science and medicine, ranging from basic science to cutting-edge translational research, and their work has been summarized in this review. Over 120 abstracts were presented at this year's meeting. This work was presented during two poster sessions, with the six most outstanding submitted abstracts presented in the form of oral presentations during the President's Forum.
    Clinical and investigative medicine. Medecine clinique et experimentale 08/2015; 38(4):E143-53.
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    ABSTRACT: Angiotensin converting enzyme inhibitors (ACEI) and type I angiotensin receptor blockers (ARB) have been shown to exert significant effects on bone tissue via a local renin-angiotensin-aldosterone system (RAS). The aim of our study was to delineate their influences on fracture healing process. Sixty adult male Wistar Albino rats were divided into three groups. After undergoing surgical femoral fracture and fixation, the ACEI group received 10 mg/kg of Enalapril, the ARB group received 10 mg/kg of Losartan and the Control group did not receive any medication. Fracture healing was evaluated at second and fifth postoperative weeks by the Lane-Sandhu radiological staging system and by histological scoring system of Huoet al. ACE expression in fracture callus was studied by immunohistochemistry. Both ACEI and ARB groups showed less fibrous tissue in the fracture area at the second week, but the histologic score differences were significant only between Control and ARB groups. At the fifth week, however, both radiological and histological scores for the ACEI group were significantly higher than both ARB and Control groups, while the scores for ARB and Control groups were similar. The presence of ACE expression in fracture callus was also observed. ACEIs had significant positive effects on fracture repair. Losartan failed to display these stimulatory effects, which suggests that local RAS in bone tissue exerts its actions via alternative receptors or pathways than the AT1 receptor.
    Clinical and investigative medicine. Medecine clinique et experimentale 08/2015; 38(4):E164-72.
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    ABSTRACT: Purpose: The relationship between the number of cytosine-adenine base pair repetition [(CA)n] in the promoter zone of ADAMTS9 gene, which may affect the collagen structure, and the developmental hip dysplasia was investigated. Methods: Using DNA isolating from 26 patients diagnosed with developmental hip dysplasia (DDH) and 29 patients without DDH, the (CA)n in the promoter zone of ADAMTS9 was calculated. The distributions of groups were measured by Shapiro-Wilk test, and the average results of the groups in the state of their normal distributions were compared using parametric Student t test. Results: While the (CA)n values varied between 15 and 30, the group average was found to be 17.9. While the (CA)n values of the patient group varied between 11 and 20, its average was computed to be 17.3. The averages of groups were not statistically different (p = 0.960). Conclusion: According to the results of our study, ADAMTS9 gene promoter (CA)n in the individuals with developmental hip dysplasia was not found to be different from that of healthy individuals. Nevertheless, when strong impact of ADAMTS9 gene on the ligament tissue is considered, it is necessary to evaluate ADAMTS9 gene role with different aspects.
    Clinical and investigative medicine. Medecine clinique et experimentale 08/2015;
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    ABSTRACT: The purpose of this study was to evaluate the ability of specific biomarkers to predict acute kidney injury (AKI) after partial nephrectomy. A prospective study of 89 patients undergoing partial nephrectomy was conducted in the First Affiliated Hospital of Fujian Medical University. The patients were divided into two groups according to AKI status: an AKI group and non-AKI group. Receiver operator characteristic (ROC) curves were generated and the areas under the curve (AUCs) were compared. Twenty-eight subjects (31.5%) developed AKI while sixty-one subjects (68.5%) did not. Vascular clamping time in the AKI group was longer than that in the non-AKI group (29 ± 17 min vs. 24 ± 9 min, P = 0.042). Eight patients (28.6%) received blood infusion in the AKI group compared with five patients (8.2%) in the non-AKI group (P = 0.021). The area under ROC curve for AKI prediction was 0.792 [95% confidence interval (CI) 0.697 to 0.888, P < 0.000] for serum cystatin C 24 hours after surgery and 0.756 (95% CI 0.656 to 0.857, P < 0.000) for serum cystatin C 48 hours after surgery. Multivariate regression analysis showed transfusion [Hazard ratio (HR) 3.712, P = 0.044] and 24 hours serum cystatin C (HR 41.594, P = 0.001) correlated with AKI. Postoperative serum cystatin C may be an early predictor for AKI after partial nephrectomy. Transfusion may be an independent risk factor for AKI after partial nephrectomy.
    Clinical and investigative medicine. Medecine clinique et experimentale 06/2015; 38(3):E82-E89.
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    ABSTRACT: Circulating levels of visfatin, a ubiquitous adipokine, may reflect both the severity of plaque as well as degree of plaque stabilization in acute myocardial injury. The purpose of this study was to test whether the level of visfatin is associated with the occurrence of major adverse cardiovascular events (MACEs) in patients with acute ST-elevation myocardial infarction (STEMI). Consecutive patients (n=185) with acute STEMI were prospectively enrolled in the study. ELISA was used to measure plasma visfatin concentrations. Composite MACEs included death, recurrent myocardial infarction, target lesion revascularization or re-advanced heart failure. Plasma visfatin levels were significantly higher in composite MACE patients than in non-MACE patients. A multivariate Cox hazard regression model revealed that the predictive independent risk factors for the occurrence of composite MACEs were visfatin level (relative risk = 1.04) and age (relative risk = 6.05). When patients were grouped according to their plasma visfatin levels, composite MACEs occurred more frequently in patients presenting with high visfatin levels. Moreover, Kaplan-Meier analysis revealed that high visfatin levels were significantly associated with the occurrence of composite MACEs. The level of plasma visfatin may be associated with risk of composite MACEs in STEMI patients, and may be useful for risk stratification.
    Clinical and investigative medicine. Medecine clinique et experimentale 06/2015; 38(3):E100-E109.
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    ABSTRACT: Volume-controlled ventilation (VCV) has been the traditional mechanical ventilation mode in laparoscopic surgery. Pressure-controlled ventilation (PCV) has been used more frequently in recent years, especially for patients with complicated conditions; however, evidence on whether PCV is superior to VCV is still lacking. A meta-analysis was used to compare the effects of PCV and VCV on respiratory and hemodynamic parameters during laparoscopic surgery. PubMed and Embase were each searched from their inception to December 2014 for randomized controlled trials comparing the effects of PCV and VCV on respiratory and hemodynamic parameters during laparoscopic surgery. Standard mean difference (SMD) with 95% confidence interval (CI) was calculated using a random effect model. Outcomes were assessed at three times: preoperative (T1), intraoperative (T2) and postoperative (T3). Respiratory mechanics (including peak airway pressure, plateau pressure, mean airway pressure, compliance, airway resistance, minute volume, end-tidal CO2 tension and tidal volume) and hemodynamic parameters (including heart rate and mean arterial pressure) were calculated. Eight randomized controlled trials with a total of 428 participants, 214 cases using PCV and 214 cases using VCV, were included in the meta-analysis. No significant differences were detected between the groups in terms of hemodynamic parameters. In contrast, with respiratory mechanics, PCV was slightly but significantly associated with lower peak airway pressure, higher compliance, lower airway resistance at T1, lower peak airway pressure, higher compliance, higher mean airway pressure at T2, lower peak airway pressure, lower mean airway pressure and higher end-tidal CO2 tension at T3. For the rest of respiratory parameters, there were no statistical differences between the groups. Subgroup analysis by morbidly obese, type of operations and quality of studies, showed similar results. Our meta-analysis suggests that hemodynamic parameters are similar in patients who underwent laparoscopic surgery with PCV and VCV, but patients who had PCV exhibited mildly better respiratory data.
    Clinical and investigative medicine. Medecine clinique et experimentale 06/2015; 38(3):E119-E141.
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    ABSTRACT: Pharmacotherapy for diabetes in real-world clinical settings is very complex and is posing a challenge for residents in training. The purpose of this study was to explore the views of residents in Canada regarding educational priorities for pharmacotherapy in diabetes management. A questionnaire was developed to explore different domains of pharmacotherapy in diabetes management, including different clinic>al settings, combination pharmacotherapy with different classes of medications and patients' characteristics, including comorbidities and cardiovascular risk factors. The questionnaire and the letter of invitation was sent to residents through their program directors. The results were gathered through an online survey system. Due to the study design, response rate could not be determined. For data analysis, SPSS Software was used for statistical analysis. Chi-square testing was utilized for comparisons of proportions. Thirty-four residency programs in Canada were contacted and 165 residents completed the study. A significant number of the residents (59%) viewed combination pharmacotherapy for diabetes management as the most important educational priority (p < 0.001). Regarding insulin therapy, combination of insulin with another class of agents was recognized as the most important educational priority by 51% of residents (p < 0.001). Among all classes of medication for blood glucose management the education on the use of newer class of medication such as GLP1 agonists, DPP4 inhibitors and SGLT2 inhibitors was recognized as a priority by 77% of residents (p < 0.001). This study provides new data and insights into residents' views on diabetes pharmacotherapy. Educational curriculums may incorporate these views from residents on the educational priorities that were identified in this study.
    Clinical and investigative medicine. Medecine clinique et experimentale 06/2015; 38(3):E73-E81.
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    ABSTRACT: To determine the reliability of arterial phase capture and evaluate hypervascular lesion contrast kinetics with a combined view-sharing and parallel imaging dynamic contrast-enhanced acquisition, DIfferential Sub-sampling with Cartesian Ordering (DISCO), in patients with known chronic liver disease. A retrospective review of 3T MR images from 26 patients with known chronic liver disease referred for hepatocellular carcinoma surveillance or post-treatment follow up was performed. After administration of a gadolinium-based contrast agent, a multiphasic acquisition was obtained in a 28 s breath-hold, from which seven sequential post-contrast image volumes were reconstructed. The late arterial phase was successfully captured in all cases (26/26, 95% CI 87-100%). Images obtained 26 s post-injection had the highest frequency of late arterial phase capture (20/26) and lesion detection (23/26) of any individual post-contrast time; however, the multiphasic data resulted in a significantly higher frequency of late arterial phase capture (26/26, p=0.03) and a higher relative contrast (5.37+/-0.97 versus 7.10+/-0.98, p < 0.01). Multiphasic acquisition with combined view-sharing and parallel imaging reliably captures the late arterial phase and provides sufficient temporal resolution to characterize hepatic lesion contrast kinetics in patients with chronic liver disease while maintaining high spatial resolution.
    Clinical and investigative medicine. Medecine clinique et experimentale 06/2015; 38(3):E90-E99.
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    ABSTRACT: Neutrophil gelatinase-associated lipocalin (NGAL) is a protein belonging to the lipocalin superfamily and plays a role in atherosclerosis, renal injury and inflammation. The present study aimed to investigate serum NGAL concentrations in groups of patients with dipper and non-dipper hypertension (HT) and to characterize the relationship between NGAL concentration and circadian blood pressure in hypertensive patients. A total of 41 (22 male, 19 female, mean age: 56.1 ±8.9 years) non-dipper HT patients, 40 (19 male, 21 female, mean age: 54.0 ±10.0 years) dipper HT patients and 42 age- and gender-matched healthy individuals were enrolled in the study. Dipper and non-dipper HT were diagnosed via ambulatory blood pressure monitoring. Serum NGAL concentrations were measured by enzyme-linked immunosorbent assay from blood samples obtained from patients. Serum NGAL concentrations were found to be significantly higher in the non-dipper and dipper HT patient groups in comparison with the control group (84.9 ±23.0 ng/ml and 62.1 ±17.8 vs. 46.6 ± 13.7 ng/ml, p.
    Clinical and investigative medicine. Medecine clinique et experimentale 04/2015; 38(1):E53-62.
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    ABSTRACT: Epicardial fat is visceral adipose tissue that possesses inflammatory properties. Inflammation and obesity are associated with cardiovascular disease and arrhythmogenesis, but little is known about the relationship between epicardial fat and PR-Interval prolongation. The purpose of this study was to investigate the association between epicardial adipose tissue (EAT) volume and PR-interval prolongation as assessed by computed tomography (CT) and Twelve-lead ECGs. Patients (n=287) were referred for 64-slice CT for exclusion of coronary artery disease and EAT volumes were determined. Twelve-lead ECGs were obtained from each subject and were evaluated by two independent readers. Patients with significant PR interval prolongation had higher median EAT volume than patients with normal PR interval. Statistically significant correlations were observed between the EAT volume and the PR interval (p = 0.183, p = 0.003), and QRS duration (p = 0.144, p = 0.018). Multivariate and trend analyses confirmed that EAT volume was independently associated with the presence of PR interval prolongation. The receiver operator characteristics curve of EAT volume showed that an EAT volume >144.4 cm&sup3; was associated with PR interval prolongation. This study indicates that EAT volume is highly associated with PR interval prolongation. Whether epicardial fat plays a role in the pathogenesis of PR interval prolongation requires future investigation.
    Clinical and investigative medicine. Medecine clinique et experimentale 04/2015; 38(1):E45-52.
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    ABSTRACT: Post-treatment hypothyroidism is common in Graves' disease, and clinical guidelines recommend monitoring for it; however, thyroid stimulating hormone (TSH) can remain suppressed in these patients following treatment. The objectives of this study were to explore the proposed pathophysiology behind the phenomenon of post-therapy TSH suppression and to systematically review existing clinical data on post-therapy TSH suppression in patients with Graves' disease. A systematic literature search was performed using EMBASE and PubMed databases, with several combinations of MeSH terms. Bibliography mining was also done on relevant articles to be as inclusive as possible. A total of 18 articles described possible mechanisms for post-therapy TSH suppression. Several of the studies demonstrate evidence of thyrotroph atrophy and hypothesize that this contributes to the ongoing suppression. TSH receptors have been identified in folliculo-stellate cells of the pituitary as well as astroglial cells of the hypothalamus, mediating paracrine feedback. A few studies have demonstrated inverse correlation between autoantibody titres and TSH levels, suggestive of their role in mediating ongoing TSH suppression in patients with Graves' disease. In addition, five studies were identified that provided clinical data on the duration of TSH suppression. Combined data show that 45.5% of patients recover TSH by 3 months after treatment, increasing to 69.3% by 6 months, and plateauing to 73.8% by 12 months (p>0.0001). Sub-analysis also shows that for patients who are TBII negative, 80.7% recover their TSH by 6 months compared with only 58.7% in those who are TBII positive (p= 0.003). Clinical data suggests that TSH recovery is most likely to occur within the first 6 months after treatment, with recovery plateauing at approximately 70% of patients, suggesting that reliance on this assay for monitoring can be very misleading. Furthermore, TBII positivity is associated with lower likelihood of TSH recovery. Pathophysiology behind suppressed TSH involves not only anatomical but also autoimmune mechanisms.
    Clinical and investigative medicine. Medecine clinique et experimentale 04/2015; 38(1):E31-44.
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    ABSTRACT: Steroids, inhaled and systemic, are used to treat airway inflammation in patients with asthma; however, steroids are recognized to cause a number of side effects, including osteoporosis. We evaluated the prevalence of osteopenia/osteoporosis in patients with moderate-severe asthma managed through the Edmonton Regional Severe Asthma Centre. We performed a retrospective chart review and analyzed 57 charts on patients with moderate-severe asthma followed through the specialty clinic, and recorded their bone mineral density (BMD). Steroid use was reviewed and the frequency of osteopenia/osteoporosis was compared in patients requiring continuous systemic steroids (Group 1, n=15), intermittent systemic steroids (Group 2, n=15) or inhaled steroids only (Group 3, n=27). The mean age (mean±SD) was 50±14.8 years. Cumulative systemic steroid dose of prednisone equivalent was higher in Group 1 (12.5 mg/day) than Group 2 (3.2 mg/day) (p=0.002). The frequency of osteopenia / osteoporosis was not significantly different between patients in Group 1(67%) and Group 2 (53%, p=0.46) but was significantly greater in patients from Group 1 in comparison with Group 3 (33%, p=0.038). Patients with moderate-severe asthma have a high prevalence of reduced bone density. Many patients treated with intermittent systemic steroids for exacerbations, or who were stable on inhaled steroids, had either osteopenia or osteoporosis before the age of 50. National and international osteoporosis guidelines should emphasize earlier screening for asthma patients; and increase awareness of the detrimental effects of short-term systemic steroids and inhaled steroids on BMD, especially when started at an early age and in northern climates.
    Clinical and investigative medicine. Medecine clinique et experimentale 04/2015; 38(1):E23-30.
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    ABSTRACT: The 'Number Needed to Treat' (NNT) is a useful measure for estimating the number of patients that would need to receive a therapeutic intervention to avoid one of the adverse events that the treatment is designed to prevent. We explored the possibility of an adaption of NNT to estimate the 'Number Needed to $ave' (NN$) as a new, conceptual systems metric to estimate potential cost-savings to the health system from implementation of a treatment, or in this case, a program. We used the outcomes of the INSPIRED COPD Outreach ProgramTM to calculate that 26 patients would need to complete the program to avoid healthcare expenditures of $100,000, based on hospital bed days avoided. The NN$ does not translate into 'cost savings' per se, but redirection of resource expenditures for other purposes. We propose that the NN$ metric, if further developed, could help to inform system-level resource allocation decisions in a manner similar to the way that the NNT metric helps to inform individual-level treatment decisions.
    Clinical and investigative medicine. Medecine clinique et experimentale 02/2015; 38(1):E11-4.