Table 4.
Findings from the logistic regression models that evaluated infertility according to DII quartiles
| Models | DII quartiles | P-value Linear Trend |
|||
|---|---|---|---|---|---|
| Odds ratios, 95% confidence intervals | |||||
| Q1 (<-2.02) |
Q2 (-2.02, -1.02) |
Q3 (-1.03, 0.25) |
Q4 (> 0.26) |
||
| Crude a | Ref. | 0.81 (0.61–1.08) | 1.14 (0.88–1.48) | 1.86 (1.65–2.14) | 0.001 |
| Model 1 b | Ref. | 0.81 (0.61–1.08) | 1.17 (0.90–1.52) | 1.94 (1.71–2.25) | 0.001 |
| Model 2 c | Ref. | 0.77 (0.58–1.04) | 1.04 (0.79–1.36) | 1.76 (1.57–2.02) | 0.001 |
Note: The logistic regression test was used for analysis. a Crude model: Logistic regression without adjustment; b Model 1: Logistic regression with adjustment for age; c Model 2: Logistic regression with adjustment for age, BMI, marital status, smoking, education, alcohol drinking, energy intake and physical activity.