Kazuhiko Ohe

The University of Tokyo, Tōkyō, Japan

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Publications (108)126.43 Total impact

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    ABSTRACT: Numerous diabetes-management systems and programs for improving glycemic control to meet guideline targets have been proposed, using IT technology. But all of them allow only limited-or no-real-time interaction between patients and the system in terms of system response to patient input; few studies have effectively assessed the systems' usability and feasibility to determine how well patients understand and can adopt the technology involved. DialBetics is composed of 4 modules: (1) data transmission module, (2) evaluation module, (3) communication module, and (4) dietary evaluation module. A 3-month randomized study was designed to assess the safety and usability of a remote health-data monitoring system, and especially its impact on modifying patient lifestyles to improve diabetes self-management and, thus, clinical outcomes. Fifty-four type 2 diabetes patients were randomly divided into 2 groups, 27 in the DialBetics group and 27 in the non-DialBetics control group. HbA1c and fasting blood sugar (FBS) values declined significantly in the DialBetics group: HbA1c decreased an average of 0.4% (from 7.1 ± 1.0% to 6.7 ± 0.7%) compared with an average increase of 0.1% in the non-DialBetics group (from 7.0 ± 0.9% to 7.1 ± 1.1%) (P = .015); The DialBetics group FBS decreased an average of 5.5 mg/dl compared with a non-DialBetics group average increase of 16.9 mg/dl (P = .019). BMI improvement-although not statistically significant because of the small sample size-was greater in the DialBetics group. DialBetics was shown to be a feasible and an effective tool for improving HbA1c by providing patients with real-time support based on their measurements and inputs.
    Journal of diabetes science and technology 03/2014; 8(2):209-215.
  • Studies in health technology and informatics 01/2014; 205:1241.
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    ABSTRACT: Recently, exchanging data and information has become a significant challenge in medicine. Such data include abnormal states. Establishing a unified representation framework of abnormal states can be a difficult task because of the diverse and heterogeneous nature of these states. Furthermore, in the definition of diseases found in several textbooks or dictionaries, abnormal states are not directly associated with the corresponding quantitative values of clinical test data, making the processing of such data by computers difficult.
    Journal of Biomedical Semantics 01/2014; 5:23.
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    ABSTRACT: Objective. Complex regional pain syndrome (CRPS) describes a broad spectrum of symptoms that predominantly localize to the extremities. Although limb fracture is one of the most frequently reported triggering events, few large-scale studies have shown the occurrence of and factors associated with CRPS following limb fracture. This study aimed to show the occurrence and identify of those factors.Methods. Using the Japanese Diagnosis Procedure Combination database, we identified 39 patients diagnosed with CRPS immediately after open reduction and internal fixation (ORIF) for limb fracture from a cohort of 185 378 inpatients treated with ORIF between 1 July and 31 December of each year between 2007 and 2010. Patient and clinical characteristics such as age, gender, fracture site, duration of anaesthesia and use of regional anaesthesia were investigated by logistic regression analyses to examine associations between these factors and the in-hospital occurrence of CRPS after ORIF.Results. The occurrence of CRPS was relatively high in fractures of the distal forearm, but low in fractures of the lower limb and in patients with multiple fractures. Generally females are considered to be at high risk of CRPS; however, we found a comparable number of male and female patients suffering from CRPS after ORIF for limb fracture. In terms of perioperative factors, a longer duration of anaesthesia, but not regional anaesthesia, was significantly associated with a higher incidence of CRPS.Conclusion. Although a limited number of CRPS patients were analysed in this study, reduced operative time might help to prevent the development of acute CRPS following limb fracture.
    Rheumatology (Oxford, England) 12/2013; · 4.44 Impact Factor
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    ABSTRACT: We are aware of only one report describing the relationship between operative volume and outcomes in musculoskeletal tumor surgery, although numerous studies have described such relationships in other surgical procedures. The aim of the present study was to use a nationally representative inpatient database to evaluate the impact of hospital volume on the rates of postoperative complications and in-hospital mortality after musculoskeletal tumor surgery. We used the Japanese Diagnostic Procedure Combination administrative database to retrospectively identify 4803 patients who had undergone musculoskeletal tumor surgery during 2007 to 2010. Patients were then divided into tertiles of approximately equal size on the basis of the annual hospital volume (number of patients undergoing musculoskeletal tumor surgery): low, twelve or fewer cases/year; medium, thirteen to thirty-one cases/year; and high, thirty-two or more cases/year. Logistic regression analyses were performed to examine the relationships between various factors and the rates of postoperative complications and in-hospital mortality adjusted for all patient demographic characteristics. The overall postoperative complication rate was 7.2% (348 of 4803), and the in-hospital mortality rate was 2.4% (116 of 4803). Postoperative complications included surgical site infections in 132 patients (2.7%), cardiac events in sixty-four (1.3%), respiratory complications in fifty-one (1.1%), sepsis in thirty-one (0.6%), pulmonary emboli in sixteen (0.3%), acute renal failure in eleven (0.2%), and cerebrovascular events in seven (0.1%). The postoperative complication rate was related to the duration of anesthesia (odds ratio [OR] for a duration of more than 240 compared with less than 120 minutes, 2.44; 95% confidence interval [CI], 1.68 to 3.53; p < 0.001) and to hospital volume (OR for high compared with low volume, 0.73; 95% CI, 0.55 to 0.96; p = 0.027). The mortality rate was related to the diagnosis (OR for a metastatic compared with a primary bone tumor, 3.67; 95% CI, 1.66 to 8.09; p = 0.001), type of surgery (OR for amputation compared with soft-tissue tumor resection without prosthetic reconstruction, 3.81; 95% CI, 1.42 to 10.20; p = 0.008), and hospital volume (OR for high compared with low volume, 0.26; 95% CI, 0.14 to 0.50; p < 0.001). We identified an independent effect of hospital volume on outcomes after adjusting for patient demographic characteristics. We recommend regionalization of musculoskeletal tumor surgery to high-volume hospitals in an attempt to improve patient outcomes. Prognostic Level II. See Instructions for Authors for a complete description of levels of evidence.
    The Journal of Bone and Joint Surgery 09/2013; 95(18):1684-91. · 4.31 Impact Factor
  • Yuichi Yoshida, Takeshi Imai, Kazuhiko Ohe
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    ABSTRACT: We evaluate the status of health information system (HIS) adoption (In this paper, "HIS" means electronic medical record system (EMR) and computerized provider order entry system (CPOE)). We also evaluate the affect of the policies of Japanese government. The status of HIS adoption in Japan from 2002 to 2011 was investigated using reports from complete surveys of all medical institutions conducted by the Ministry of Health, Labour and Welfare (MHLW). HIS-related budgets invested by the Japanese government from 2000 to 2008 were surveyed mainly using literatures and administrative documents of the Japanese government (MHLW and Ministry of Economy, Trade and Industry). The rates of HIS adoption in Japan in 2011 were: 20.9% for the rate of EMR adoption in clinics, 20.1% for the rate of EMR adoption and 36.6% for the rate of CPOE adoption in hospitals. In hospitals, the rate of EMR and CPOE adoption were 51.5% and 78.6% in 822 large hospitals (400 or more beds), 27.3% and 52.1% in 1832 medium hospitals (200-399 beds), and 13.5% and 26.0% in 5951 small hospitals (less than 200 beds), respectively. Japan has a large number of medical institutions (99,547 clinics and 8605 hospitals) with a low rate of EMR adoption in clinics and a high rate of HIS adoption in hospitals. The national budget to expand HIS use was implemented for medium and large hospitals mainly. The policy target of New IT Reform Strategy was not achieved. The rate of HIS adoption in Japanese medium and large hospitals is high compared to small hospitals and clinics, and this is attributable to the fact that the Japanese government placed the target for HIS adoption on key hospitals with a large number of beds and concentrated budget investment in those hospitals. Besides, legal approval of EMR and the introduction of Diagnostic Procedure Combination system facilitated EMR adoption. There is less financial support for small hospitals than medium and large hospitals. The low rate of EMR adoption in clinics stems from the facts that there was little subsidies or incentives in the national remuneration for medical services, lack of cooperation from medical associations, and a failed attempt to mandate computerization of medical accounting (medical billing). Giving financial incentives is an effective means of raising EMR adoption rate. For wide usage of HIS, more financial support and incentive may be necessary for small hospitals and clinics.
    International Journal of Medical Informatics 08/2013; · 2.72 Impact Factor
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    ABSTRACT: WHAT'S KNOWN ON THE SUBJECT? AND WHAT DOES THE STUDY ADD?: Recently, the ineffectiveness of bowel mechanical preparation prior to colorectal surgery was focused on. Although its effectiveness was widely accepted in laparoscopic prostatectomy, the data were limited. This retrospective multicentre study compared laparoscopic prostatectomy cases with and without bowel preparation and did not demonstrate the preparation's preferable effect in operation time and complication incidence, which suggested justification of the omission of bowel preparation. To evaluate the effect of mechanical bowel preparation (MBP) prior to laparoscopic radical prostatectomy on peri-operative outcomes. Patients undergoing laparoscopic radical prostatectomy for T1-T2 tumours between 2008 and 2010 were identified in the Japanese Diagnosis Procedure Combination database. Patients were classified into a preoperative MBP group and a non-MBP group. The effects of MBP were evaluated by multivariate regression analysis of overall complication rate, operation time, postoperative length of stay (PLOS) and total costs with generalized estimating equations adjustment involving age, body mass index, Charlson score, hospital academic status and hospital volume. Comparing the 154 non-MBP and 580 MBP patients, overall complication rate, operation time, PLOS and total costs were 6.5% vs 6.9% (P = 0.860), 222 vs 250 min (P = 0.001), 11 vs 10 days (P < 0.001) and 18 941 vs 19 015 US dollars (P = 0.032), respectively. In the multivariate analyses, no significant differences were observed for the four outcomes (P = 0.961, 0.194, 0.383 and 0.993, respectively). Complications were more frequently observed in older patients, and operation time tended to be longer in patients with higher body mass index and in hospitals with lower volumes. Longer PLOS and higher total costs were associated with older age, higher Charlson score and lower hospital volume. We could not find any superiority of MBP on overall complications, operation time, PLOS and total costs in laparoscopic radical prostatectomy. The results support that MBP can be omitted prior to laparoscopic radical prostatectomy for T1-T2 prostate cancer.
    BJU International 07/2013; 112(2):E76-E81. · 3.13 Impact Factor
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    ABSTRACT: BACKGROUND: Limited information is available regarding the incidence, risk factors, and optimal prophylaxis in orthopaedic oncology patients, although malignancy and major orthopaedic surgery are associated with an increased pulmonary embolism (PE) risk. QUESTIONS/PURPOSES: We aimed to investigate the incidence of PE after musculoskeletal tumor surgery in Japanese patients and analyze the potential risk factors for PE. METHODS: We retrospectively identified 3750 patients (1981 males, 1769 females) who underwent musculoskeletal tumor surgery during 2007 to 2010 using the Japanese Diagnostic Procedure Combination administrative database. Data collected included sex, age, primary diagnosis, type of surgery, duration of anesthesia, and comorbidities that may affect PE incidence. Univariate logistic regression analyses were performed to examine the relationship of each factor with PE occurrence. RESULTS: We identified 10 patients with PE during the survey period. A primary malignant bone tumor was associated with a significantly higher risk of PE than a primary malignant soft tissue tumor (odds ratio [OR], 5.58; 95% CI, 1.39-22.42). Bone tumor resection (OR, 7.94; 95% CI, 1.77-35.59) and prosthetic reconstruction (OR, 9.15; 95% CI, 1.52-55.07) were associated with a significantly higher risk of PE than soft tissue tumor resection. CONCLUSIONS: Malignant bone tumors and bone tumor resections have a higher risk of PE than malignant soft tissue neoplasms and soft tissue resections. Both populations might require PE prophylaxis as it is likely that the risk is greater than with other major orthopaedic surgery, but data accumulation should continue, and further investigation should be done to clarify details of the incidence, risk factors, and optimal prophylaxis for PE. LEVEL OF EVIDENCE: Level II, prognostic study. See Guidelines for Authors for a complete description of levels of evidence.
    Clinical Orthopaedics and Related Research 05/2013; · 2.79 Impact Factor
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    ABSTRACT: OBJECTIVES: To evaluate risk factors of severe adverse events after percutaneous nephrolithotomy with an emphasis on operation time, and to develop a nomogram for predicting them. METHODS: This was an observational retrospective study including 1511 patients who underwent percutaneous nephrolithotomy in 332 hospitals identified from the Japanese Diagnosis Procedure Combination database between 2007 and 2010. Severe adverse events were defined as follows: (i) in-hospital mortality; (ii) postoperative medications including catecholamine, gamma-globulin products, protease inhibitors and medications for disseminated intravascular coagulation; and (iii) postoperative interventions including central vein catheterization, dialysis and mechanical cardiopulmonary support. Univariate and multivariate logistic regression analyses were carried out for the occurrence of severe adverse events, and a nomogram was generated from this model. RESULTS: Overall, 126 severe adverse events (8.34%) were identified. In the multivariate model, a linear trend between severe adverse events and operation time was observed (OR 4.72 for 120-179 min to 17.95 for ≥300 min compared with ≤119 min; each P < 0.05) after adjustment for sex, age, Charlson Comorbidity Index and type of admission. Female sex and emergency admission were also significant risk factors (OR 1.92 and 2.04, respectively), and hospital volume did not reach statistical significance. The nomogram based on these results was well fitted to predict a probability between 0.05 and 0.40 (concordance index 0.696). CONCLUSIONS: Longer operation time is a significant and independent risk factor for severe adverse events after percutaneous nephrolithotomy. Our nomogram can be an effective tool for predicting postoperative complications.
    International Journal of Urology 04/2013; · 1.80 Impact Factor
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    ABSTRACT: Differences in effectiveness between haloperidol injection and oral atypical antipsychotics in the acute-phase treatment of schizophrenia are not well examined. We retrospectively investigated whether these treatment options affected the length of mechanical restraint. We used the Japanese Diagnosis Procedure Combination Database to identify schizophrenia patients who were involuntarily hospitalized and receiving mechanical restraint between July and December, 2006-2009. Data included patient demographics, use of antipsychotics, and number of days on which patients underwent mechanical restraint. Propensity score matching was performed to compare the number of days of mechanical restraint between the haloperidol injection group and the oral atypical antipsychotics group. We used survival analysis to examine whether the initial difference in treatment affected the number of days of mechanical restraint. Cox regression was performed to compare the concurrent effects of various factors. Among 1731 eligible patients, 574 were treated with haloperidol injections and 420 with atypical antipsychotics. Matching produced 274 patients in each group. Cox regression analysis showed that the initial therapeutic agents did not significantly affect the number of days of mechanical restraint. The results indicate that atypical antipsychotics were as effective as haloperidol injections in the acute-phase treatment of schizophrenia.
    Psychiatry research. 03/2013;
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    ABSTRACT: OBJECTIVES: Although cost analyses for emergency care are essential, data on costs of care for out-of-hospital cardiopulmonary arrest (OHCA) are scarce. The present study aimed to analyze health care costs related to OHCA using a nationwide administrative database in Japan. METHODS: Using the Diagnosis Procedure Combination database in Japan, we identified OHCA patients who were transported to 779 emergency medical centres between July and December in 2008 and 2009. We assessed patient survival and discharge status, receipt of specific treatments, and costs of in-hospital care. RESULTS: A total of 21,750 OHCA patients were identified. Overall, 59.6% were males, and the average age was 70.3 years. Of them, 1,394 (6.4%) resulted in death without attempted resuscitation after hospital arrival (Group A), 14,973 (69.0%) died on admission day despite resuscitation attempts (Group B), 3,680 (17.0%) died at ≥ 2 days after admission despite resuscitation attempts (GroupC), 785 (3.6%) survived and were discharged to home (Group D) and 873 (4.0%) survived and discharged to other than home (Group E). The median total costs were $434, $1,735, $4,869, $28,097 and $31,161 in Groups A to E, respectively. Positive survival status, longer hospital stay and receipt of specific treatments were significant predictors of higher total costs. After adjustment for these factors, higher age was associated with lower costs. CONCLUSIONS: The findings in the present study add further evidence to existing knowledge about healthcare costs related to OHCA.
    Resuscitation 03/2013; · 3.96 Impact Factor
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    ABSTRACT: OBJECTIVE: To examine the magnitude of the adverse impact of high-dose methylprednisolone treatment in patients with acute cervical spinal cord injury (SCI). METHODS: We examined the abstracted data from the Japanese Diagnosis Procedure Combination database, and included patients with ICD-10 code S141 who were admitted on an emergency basis between 1 July and 31 December in 2007-2009. The investigation evaluated the patients' sex, age, comorbidities, Japan Coma Scale, hospital volume and the amount of methylprednisolone administered. One-to-one propensity-score matching between high-dose methylprednisolone group (>5000 mg) and control group was performed to compare the rates of in-hospital death and major complications (sepsis; pneumonia; urinary tract infection; gastrointestinal ulcer/bleeding; and pulmonary embolism). RESULTS: We identified 3508 cervical SCI patients (2652 men and 856 women; mean age, 60.8±18.7 years) including 824 (23.5%) patients who received high-dose methylprednisolone. A propensity-matched analysis with 824 pairs of patients showed a significant increase in the occurrence of gastrointestinal ulcer/bleeding (68/812 vs 31/812; p<0.001) in the high-dose methylprednisolone group. Overall, the high-dose methylprednisolone group demonstrated a significantly higher risk of complications (144/812 vs 96/812;OR, 1.66; 95% CI 1.23 to 2.24; p=0.001) than the control group. There was no significant difference in in-hospital mortality between the high-dose methylprednisolone group and the control group (p=0.884). CONCLUSIONS: Patients receiving high-dose methylprednisolone had a significantly increased risk of major complications, in particular, gastrointestinal ulcer/bleeding. However, high-dose methylprednisolone treatment was not associated with any increase in mortality.
    Emergency Medicine Journal 02/2013; · 1.78 Impact Factor
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    ABSTRACT: The Japanese Society of Hypertension (JSH) updated its hypertension management guidelines in 2009. One of the most significant changes with respect to the 2004 version was the stance towards the use of diuretics: in 2004, their use was cautioned against, but in 2009, it was actively promoted. The purpose of this study was to measure the impact of this change in guidelines on prescription patterns for antihypertensive medications, and to investigate the overall trend in the use of antihypertensives. We used monthly claims data obtained from a database company. Data of patients who were 20 or more years old and prescribed antihypertensives were extracted and analyzed. There were 66 223 patients who were prescribed antihypertensives (mean age 53.6±11.0). Of these, 38 130 were men and 28 093 were women. The two most prescribed classes of antihypertensives were angiotensin receptor blockers, whose usage steadily increased over a 7-year period, and calcium channel blockers. Prescriptions for antihypertensives in these two classes were also more likely to be continued than those for other antihypertensive classes. The prescription rate for diuretics increased from December 2006 (P<0.0001), but the rate of increase was the same before and after 2009 (P=0.09). The clinical guidelines published in 2009 had no apparent impact on the trend of diuretic prescriptions, despite the radical change in stance concerning the use of antihypertensives. Further effort to disseminate the content of these guidelines, so that it is reflected in actual clinical practice, may be warranted.Hypertension Research advance online publication, 7 February 2013; doi:10.1038/hr.2012.216.
    Hypertension Research 02/2013; · 2.94 Impact Factor
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    ABSTRACT: We compared perioperative outcomes and costs between open and laparoscopic radical prostatectomy for prostate cancer. The Japanese Diagnosis Procedure Combination database, including cases from 2007 to 2010, was used by one-to-one propensity-score matching. The following items were compared: complication rate; homologous and autologous transfusion rate; first cystography day and cystography repeat rate; anesthesia time; postoperative length of stay; and costs. Multivariate analyses were carried out by including age, Charlson Comorbidity Index, T stage, hospital volume and hospital academic status as variables. As a result, among 15 616 open and 1997 laparoscopic radical prostatectomies, 1627 propensity-score matched pairs were generated. The laparoscopic approach showed a better overall complication rate (3.4% vs 5.0%), homologous transfusion rate (3.3% vs 9.2%), autologous transfusion rate (44.9% vs 79.3%), first cystography day (mean 6th vs 7th day), mean postoperative length of stay (mean 11 vs 13 days), and cost without surgery and anesthesia (mean $7965 vs $9235; all P < 0.001). Anesthesia time was longer (mean 345 vs 285 min) and total cost was higher (mean $14 980 vs $12 356) for the laparoscopic approach (both P < 0.001). The secondary cystography rates were comparable between the groups (18.3% vs 15.7%, P = 0.144). The multivariate analyses showed similar trends. In conclusion, these findings confirm several benefits of laparoscopy over open approach for radical prostatectomy.
    International Journal of Urology 01/2013; · 1.80 Impact Factor
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    ABSTRACT: It is important for myocardial infarction patients to undergo immediate reperfusion of the affected coronary artery. In order to improve the prognosis, efforts to shorten the door to balloon time to within 90 minutes have been made. However, conventional methods such as faxing electrocardiograms (ECG) have not become widespread due to their high cost and lack of sharpness of the ECG. The "Doctor Car" (rapid response car system) of Kitasato University Hospital is now equipped with a Mobile Cloud ECG system. With this system, 12-lead ECG data obtained in the field are transmitted to the cloud server via a standard mobile telephone network. Since it uses an existing phone network, the cost of this system is low and it is fairly reliable. Cardiologists at the hospital read the ECG waveforms on the cloud server and decide whether emergency cardiac catheterization is necessary. In our fi rst case using this Mobile Cloud ECG system, the door to balloon time could be shortened.
    International Heart Journal 01/2013; 54(1):45-7. · 1.13 Impact Factor
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    ABSTRACT: The openEHR has adopted the dual model architecture consisting of Reference Model and Archetype. The specification, however, lacks formal definitions of archetype semantics, so that its behaviors have remained ambiguous. The objective of this poster is to analyze semantics of the openEHR archetypes: its variance and mutability. We use a typed lambda calculus as an analyzing tool. As a result, we have reached the conclusion that archetypes should be 1) covariant and 2) immutable schema.
    Studies in health technology and informatics 01/2013; 192:990.
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    ABSTRACT: Medication alert systems have been implemented worldwide. The purpose of this study is evaluation of the medication alert systems from a clinical perspective. We surveyed physicians with regard to their reactions to the medication alerts. We collected the revised prescription information and assessed risk avoidance in all cases. The system reviewed 51,006 prescriptions and produced 16,718 physician alerts related to 13,823 prescriptions over the course of 1 month. We identified 45 prescriptions that were revised following the alert and four cases in which patient treatment may have been discontinued or adverse drug events (ADEs) may have occurred if the alerts had not been issued. We demonstrated that the system prevented these potential medication errors. This study adopted a clinical perspective and demonstrated that a real-time alert system can contribute to prevention of ADEs.
    Studies in health technology and informatics 01/2013; 192:1030.
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    ABSTRACT: To assess the effect of mechanical bowel preparation (MBP) before laparoscopic nephrectomy in terms of operation time and perioperative complications. Patients undergoing laparoscopic nephrectomy for T1-T3 tumors were identified in the Japanese Diagnosis Procedure Combination database from 2008 to 2010. The patients were stratified into a preoperative MBP group (polyethylene glycol electrolyte, magnesium citrate solution, and sodium picosulfate) and a non-MBP group and were matched using one-to-one propensity score matching according to age, sex, Charlson score, T category, hospital volume, and hospital academic status. The operation time, postoperative length of stay, and overall complication rate were assessed by multivariate regression analyses. Of 2740 patients in 355 hospitals, 1110 pairs were generated. The median operation time, postoperative stay, and overall complication rate (MBP vs non-MBP group) was 278 and 268 minutes (P <.004), 10.3 and 10.0 days (P = .695), and 11.8% and 11.4% (P = .740), respectively. The multivariate regression analyses did not find significant superiority of MBP for the 3 endpoints (all P >.05). A shorter operation time was significantly associated with female sex and early-stage tumor. Older age, greater Charlson score, and lower hospital volume adversely affected the postoperative stay and overall complication rate. Stage T3 tumor was unfavorable for the postoperative stay. Our large-scale propensity score-matched analysis did not demonstrate a benefit for MBP in operation time, postoperative stay, or overall complications. The results suggest that MBP can be safely omitted before laparoscopic nephrectomy for T1-T3 tumors.
    Urology 01/2013; 81(1):74-9. · 2.13 Impact Factor
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    ABSTRACT: This study presents a prediction-based approach to determine thresholds for a medication alert in a computerized physician order entry. Traditional static thresholds can sometimes lead to physician's alert fatigue or overlook potentially excessive medication even if the doses are belowthe configured threshold. To address this problem, we applied a random forest algorithm to develop a prediction model for medication doses, and applied a boxplot to determine the thresholds based on the prediction results. An evaluation of the eight drugs most frequently causing alerts in our hospital showed that the performances of the prediction were high, except for two drugs. It was also found that using the thresholds based on the predictions would reduce the alerts to a half of those when using the static thresholds. Notably, some cases were detected only by the prediction thresholds. The significance of the thresholds should be discussed in terms of the trade-offs between gains and losses; however, our approach, which relies on physicians' collective experiences, has practical advantages.
    Studies in health technology and informatics 01/2013; 192:229-33.

Publication Stats

530 Citations
126.43 Total Impact Points


  • 2005–2014
    • The University of Tokyo
      • • Faculty & Graduate School of Medicine
      • • Center for Knowledge Structuring
      Tōkyō, Japan
  • 1996–2014
    • Tokyo Medical University
      Edo, Tōkyō, Japan
  • 2012
    • University of Occupational and Environmental Health
      • Department of Preventive Medicine and Community Health
      Kitakyūshū, Fukuoka, Japan
    • Iwata City Hospital
      Ивата, Shizuoka, Japan