BACKGROUND & AIMS Physicians' own screening practices might affect screening in their patients. We conducted a population-based study to evaluate whether family physicians who underwent colorectal cancer testing were more likely to have patients who underwent colorectal cancer testing. METHODS We collected demographic and health care information on residents of Ontario, Canada from administrative databases; the sample was restricted to individuals at average risk of colorectal cancer who were 52-74 years old as of April 21, 2016. We obtained a list of all registered physicians in the province; physicians (n = 11,434) were matched with nonphysicians (n = 45,736) on age, sex, and residential location. Uptake of colorectal tests was defined by a record of a fecal occult blood test in the past 2 years, flexible sigmoidoscopy in the past 5 years, or colonoscopy in the past 10 years. Patients were assigned to family physicians based on billing claim frequency, and then the association between colorectal testing in family physicians and their patients was examined using a modified Poisson regression model. RESULTS Uptake of colorectal tests by physicians and nonphysicians (median age 60 years; 71% men) was 67.9% (95% confidence interval [CI], 67.0%-68.7%) and 66.6% (95% CI, 66.2%-67.1%), respectively. Physicians were less likely than nonphysicians to undergo fecal occult blood testing and were more likely to undergo colonoscopy; prevalence ratios were 0.44 (95% CI, 0.42-0.47) and 1.24 (95% CI, 1.22-1.26), respectively. Uptake of colorectal tests by family physicians was associated with greater uptake by their patients (adjusted prevalence ratio, 1.10; 95% CI, 1.08-1.12). CONCLUSIONS Approximately one-third of physicians and nonphysicians are overdue for colorectal cancer screening. Patients are more likely to be tested if their family physician has been tested. There is an opportunity for physicians to increase their participation in colorectal cancer screening, which could, in turn, motivate their patients to undergo screening.

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医师对大肠癌的筛查与他们的患者摄取的增加有关。

背景与目的医师自身的筛查实践可能会影响对其患者的筛查。我们进行了一项基于人群的研究，以评估接受结直肠癌检测的家庭医生是否更有可能接受结直肠癌检测的患者。方法我们从行政数据库中收集了加拿大安大略省居民的人口统计信息和卫生保健信息。该样本仅限于截至2016年4月21日年龄在52-74岁的平均患大肠癌的个体。我们获得了该省所有注册医师的名单；在年龄，性别和居住地点，医师（n = 11,434）与非医师（n = 45,736）匹配。过去2年的粪便潜血测试记录定义了大肠测试的摄取，在过去的5年中进行了柔性乙状结肠镜检查，或者在过去的10年中进行了结肠镜检查。根据帐单申请频率将患者分配给家庭医生，然后使用改良的Poisson回归模型检查家庭医生中结肠直肠癌检测与其患者之间的关联。结果医师和非医师（年龄中位数60岁； 71％的男性）接受结直肠检查的比例分别为67.9％（95％置信区间[CI]，67.0％-68.7％）和66.6％（95％CI，66.2％-67.1％） ）， 分别。与非内科医师相比，内科医师进行粪便潜血测试的可能性更低，而进行结肠镜检查的可能性更高。患病率分别为0.44（95％CI，0.42-0.47）和1.24（95％CI，1.22-1.26）。家庭医生对大肠直肠癌检查的摄取与患者的摄取更大有关（调整患病率，1.10; 95％CI，1.08-1.12）。结论大约三分之一的医师和非医师逾期未进行大肠癌筛查。如果他们的家庭医生已经接受检查，则患者更可能接受检查。医师有机会增加他们在大肠癌筛查中的参与度，这反过来又会激发他们的患者进行筛查。