Table 3.

Association between medical school attended and quality of preventive care (mammography screening of women aged 50-69 per 1000 in primary care population) for doctors graduating before and after transition to a problem based learning curriculum in first 4-7 years of primary care practice (1990-6)

	Before transition at Sherbrooke			After transition at Sherbrooke
Medical school	Crude mean rate/1000 (SD)	Adjusted difference between schools	P value	Crude mean rate/1000 (SD)	Adjusted difference between schools	P value	Adjusted within school difference (95% CI) before and after transition	P value
Sherbrooke	158.0 (146.7)	Reference	—	204.6 (155.8)	Reference	—	55.0 (10.6 to 99.3)	0.01
Laval	104.6 (130.2)	−35.0	0.003	135.1 (131.0)	−70.9	0.002	17.5 (−13.4 to 48.3)	0.27
Montreal	114.0 (141.2)	−16.7	0.14	117.9 (139.4)	−35.4	0.13	19.0 (−14.0 to 51.8)	0.26
McGill	94.6 (110.2)	−13.0	0.41	104.7 (130.0)	−19.5	0.67	20.7 (−58.0 to 99.3)	0.61

Annual measurements adjusted for characteristics of doctor (sex, certification examination score, cumulative months of practice) and characteristics of doctor's annual primary care practice population of women aged 50-69 including age distribution, mean family income, and educational achievement of women aged 50-69 in same post code area), geographical access to mammography centres, propensity for use of healthcare services (ambulatory care groups, number of doctors seen), comorbidity, and rate of admissions to hospital in previous year. See bmj.com for additional information.