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Table 1 Characteristics of the analytical sample by place of residence in 14176 Iranian women, 1999–2000

From: A comparison of two methods for estimating odds ratios: Results from the National Health Survey

Variables Rural (n = 5219) Urban (n = 8957)
Age, years(mean, sda) 36.91 (13.58) 37.3(13.6)
BMIb(mean, sd) 24.14(4.64) 26.02(5.06)
Years of education(mean, sd) 2.59(3.42) 5.65(4.83)
Married (number) 3973 7234
Non-married (number) 1246 1723
Low economic index(number) 1655 2379
Lower-middle economic index(number) 1036 2271
Upper-middle economic index(number) 1280 2212
High economic index(number) 1248 2095
Smoker (number) 97 176
Non smoker(number) 5122 8781
  1. astandard deviation
  2. bBody mass index (weight (kg)/height(m)2).