Table 2.
Associations between weight-adjusted-waist index and the risk of infertility.
| OR1 (95%CI2), P-value | ||||
|---|---|---|---|---|
| Crude model | Minimally adjusted model | Fully adjusted model | ||
| (Model 1)3 | (Model 2)4 | (Model 3)5 | ||
| N (Infertility) | ||||
| Continuous | 364 | 1. 61 (1.42, 1.84) <0.001 |
1.47 (1.28, 1.69) <0.001 |
1.42 (1.22, 1.65) <0.001 |
| Categories | ||||
| Tertile 1 | 71 | Reference | Reference | Reference |
| Tertile 2 | 120 | 1.77 (1.30, 240) <0.001 |
1.57 (1.15, 2.15) 0.004 |
1.37 (0.99, 1.91) 0.0588 |
| Tertile 3 | 173 | 2.68 (2.01, 3.58) <0.001 |
2.22 (1.63, 3.00) <0.001 |
2.02 (1.46, 2.78) 0.01 |
| P for trend | <0.001 | <0.001 | <0.001 | |
Insensitivity analysis, the weight-adjusted-waist index was converted from a continuous variable to a categorical variable (tertiles).
195% CI: 95% confidence interval.
2OR: Odds ratio.
3Model 1: Covariates were not adjusted at all.
4Model 2: Adjusted for age, and race.
5Model 3: Adjusted for age, ratio of family income to poverty, race, education level, marital status, smoked at least 100 cigarettes, had at least 12 alcohol drinks/1 year, age when first menstrual period occurred, ever treated for a pelvic infection/PID, ever taken birth control pills, had regular periods in past 12 months.