Table 1

Frequency distribution of cases and controls by age, education, body mass index, and physical activity, Ontario, Canada: 1995–1996

VariableNo. (%) casesNo (%) controls
Age group (yrs)
 20–2423 (10.8)26 (10.3)
 25–2928 (13.2)38 (15.1)
 30–3447 (22.2)46 (18.3)
 35–3945 (21.2)45 (17.9)
 40–4429 (13.6)41 (16.3)
 45–4919 (9.0)26 (10.4)
 50–549 (4.2)11 (4.4)
 55+12 (5.7)18 (7.2)
Education
 ≤ Grade 1138 (18.1)51 (20.7)
 > Grade 11, no postsecondary39 (18.6)52 (21.1)
 > Grade 11, some postsecondary133 (63.3)143 (58.1)
BMI (kg/m2)
 <22.744 (20.8)63 (25.3)
 22.8–25.050 (23.6)66 (26.5)
 25.1–27.663 (29.7)61 (24.5)
 >27.655 (25.9)59 (23.7)
Physical activitya
 ≤141 (21.5)44 (20.1)
 >1 to ≤343 (22.5)58 (26.7)
 >3 to ≤7.541 (21.5)46 (21.0)
 >7.566 (34.6)71 (32.4)
  • a Summed moderate and strenuous activity, times/week.