Article Figures & Data
Tables
- Table 1.
Associations of General Practitioner Supplies with Breast Cancer 5-Year Survival among Women in Ontario Diagnosed Between 1995 and 1997 and Followed Until January 1, 2003
General Practitioner Supply Predictor Risk Factor Prevalence (%) Breast Cancer5-Year Survival(odds ratio [95% CI]) Provincial analysis of 17,829 breast cancer cases ≥7 per 10,000 in 2001 <7 66.2 1.09 (0.98, 1.21)* ≥7.25 per 10,000 in 2001 <7.25 68.1 1.14 (1.01, 1.29) Analysis of 10,745 cases outside the greater metropolitan Toronto area Decreased by ≥3 per 10,000 in 1991 and 2001† 16.5‡ 0.83 (0.68, 1.03)§ All effects were adjusted for patient age, census tract low-income prevalence, census division age distribution, distance from regional cancer centers, and obstetrician/gynecologist supplies. Total physician density did not enter the model. There were 10,291 and 10,122 active general practitioners in Ontario in 1991 and 2001, respectively.
* 90% confidence interval did not include the null (1.00–1.19; P < .10).
† Sensitivity analyses revealed the most predictive criterion decrement.
‡ Overrepresented by small to mid-sized cities with populations between 100,000 and 500,000.
§ 90% CI did not include the null (0.70–0.99; P < .10).
- Table 2.
Associations of Obstetrics/Gynecology Specialist Supplies with Breast Cancer 5-Year Survival in Ontario: Women Diagnosed Between 1995 and 1997 Were Followed Until January 1, 2003
Obstetrician/Gynecologist Supply Predictor Risk Factor Prevalence (%) Breast Cancer5-Year Survival(OR [95% CI]) Provincial analysis of 17,829 breast cancer cases ≥6 per 100,000 in 2001 <6 59.7 1.13 (1.01–1.27) Analysis of 10,745 cases outside the greater metropolitan Toronto area Decreased by ≥2 per 100,000 in 1991 and 2001* 20.2† 0.76 (0.61–0.96) All effects were adjusted for patient age, census tract low-income prevalence, census division age distribution, distance from regional cancer centers, and general practitioner supplies. Total physician density did not enter the model. There were 648 and 664 active obstetrician/gynecologists in Ontario in 1991 and 2001, respectively.
* Sensitivity analyses revealed the most predictive criterion decrement.
† Overrepresented by small to mid-sized cities with populations between 100,000 and 500,000.