Table 1.
Characteristics of cases and controls.
| Characteristics | Controls(n = 193) | Cases(n = 193) | OR (95% CI) | P value |
|---|---|---|---|---|
| Age (years) | ||||
| 40–49 | 19 (9.84) | 12 (6.22) | Matched | |
| 50–59 | 57 (29.53) | 63 (32.64) | ||
| 60–69 | 68 (35.23) | 65 (33.68) | ||
| 70–80 | 49 (25.39) | 53 (27.46) | ||
| BMI | ||||
| <25 kg/m2 | 95 (49.22) | 68 (35.23) | Ref | 0.020 |
| ≥25 and <30 kg/m2 | 83 (43.01) | 104 (53.89) | 1.78 (1.15–2.74) | |
| ≥30 kg/m2 | 15 (7.77) | 21 (10.88) | 2.15 (1.00–4.65) | |
| Time since the last menstrual period (years) | ||||
| 1–5 | 52 (26.94) | 43 (22.28) | Ref | 0.475 |
| 6–10 | 44 (22.80) | 50 (25.91) | 1.44 (0.78–2.66) | |
| >10 | 97 (50.26) | 100 (51.81) | 1.32 (0.76–2.27) | |
| Marital status | ||||
| Single | 6 (3.11) | 5 (2.59) | Ref | 0.937 |
| Married | 146 (75.65) | 151 (78.24) | 1.24 (0.38–4.10) | |
| Divorced/separated | 25 (12.95) | 23 (11.92) | 1.09 (0.29–4.15) | |
| Widowed | 16 (8.29) | 14 (7.25) | 1.04 (0.27–3.93) | |
| Education level | ||||
| Illiteracy | 32 (16.58) | 40 (20.73) | Ref | 0.268 |
| Primary school | 89 (46.11) | 97 (50.26) | 0.86 (0.49–1.50) | |
| Middle school | 55 (28.50) | 37 (19.17) | 0.55 (0.29–1.03) | |
| High school | 13 (6.74) | 12 (6.22) | 0.72 (0.29–1.77) | |
| College and above | 4 (2.07) | 7 (3.63) | 1.35 (0.36–5.10) | |
| Number of deliveries | ||||
| 0–2 | 146 (75.65) | 138 (71.50) | Ref | 0.671 |
| 3–5 | 35 (18.13) | 41 (21.24) | 1.22 (0.75–1.98) | |
| ≥6 | 12 (6.22) | 14 (7.25) | 1.23 (0.56–2.69) |
Values are shown as n (%). OR, odds ratio; CI, confidence interval; BMI, body mass index; Ref, reference.