Table 2.
Characteristics of the study population
| Case | Control | |
|---|---|---|
| (N = 2 101) | (N = 2 255) | |
| Sociodemographic variables | ||
| Age in years at recruitment, mean (SD) | 49.7 (9.7) | 49.8 (9.1) |
| Hindu religion, % (N) | 83 (1 741) | 79 (1 790) |
| Living in urban location, % (N) | 58 (1 223) | 50 (1 124) |
| Running water in house, % (N) | 84 (1 762) | 78 (1 732) |
| Living in stone house, % (N) | 88 (1 836) | 84 (1 881) |
| Self-contained toilet in house, % (N) | 88 (1 848) | 88 (1 959) |
| Housewife, % (N) | 73 (1 531) | 70 (1 562) |
| Diet, alcohol and tobacco | ||
| Life long vegetarianism, % (N) | 29 (611) | 25 (560) |
| Ever consumed alcohol, % (N) | <1 (13) | <1 (12) |
| Ever smoked tobacco, % (N) | 1 (11) | 2 (35) |
| Ever chewed tobacco, % (N) | 6 (133) | 10 (231) |
| Ever chewed non-tobacco, % (N) | 9 (193) | 16 (358) |
| Anthropometry | ||
| Body Mass Index in kg/m2, mean (SD) | 25.4 (9.0) | 24.6 (7.1) |
| Height in cm, mean (SD) | 154.5 (7.7) | 154.0 (7.9) |
| Reproductive factors | ||
| Age in years at menarche, mean (SD) | 13.8 (1.3) | 13.7 (1.3) |
| Age in years at first birth, mean (SD) | 22.8 (5.3) | 22.3 (4.7) |
| Number of living children, mean (SD) | 2.5 (1.2) | 2.6 (1.2) |
| Total duration of breast feeding (parous women), mean (SD) | 4.1 (2.4) | 4.6 (2.7) |
| Postmenopausal at recruitment, % (N) | 56 (1 166) | 55 (1 204) |
| Ever used oral contraceptive pill, % (N) | 3 (62) | 2 (51) |
| Ever used hormone replacement therapy, % (N) | <1 (3) | <1 (3) |
| Sterilised, % (N) | 30 (635) | 37 (821) |