Table 4 Logistic multivariate regression analyses of factors associated with primary infertility
From: Prevalence and associated factors of infertility among 20–49 year old women in Henan Province, China
Characteristic | p-value | Unadjusted OR (95% CI) | p-value | Adjusted OR (95% CI) |
|---|---|---|---|---|
Age of marriage (year) | ||||
< 0.001 | 0.006 | |||
≤ 24 | Ref | Ref | ||
25–29 | 0.024 | 2.102 (1.103–4.005) | 0.373 | 1.434 (0.649–3.168) |
≥ 30 | < 0.001 | 7.117 (2.651–19.107) | 0.002 | 6.258 (1.962–19.956) |
Age of first sexual intercourse (years) | ||||
< 0.001 | 0.003 | |||
< 20 | Ref | Ref | ||
20–25 | 0.867 | 1.098 (0.371–3.248) | 0.648 | 1.302 (0.42–4.035) |
> 25 | 0.018 | 3.752 (1.257–11.201) | 0.017 | 4.696 (1.326–16.635) |
Long-term air-conditioning environment | ||||
No | Ref | Ref | ||
Yes | 0.007 | 0.452 (0.253–0.806) | < 0.001 | 0.289 (0.152–0.547) |
DOR | ||||
No | Ref | Ref | ||
Yes | 0.006 | 3.364 (1.407–8.045) | 0.005 | 3.987 (1.52–10.456) |
Age (year) | ||||
0.030 | 0.002 | |||
20–29 | Ref | Ref | ||
30–39 | 0.268 | 0.713 (0.392–1.298) | 0.007 | 0.395 (0.201–0.779) |
40–49 | 0.009 | 0.142 (0.003–0.619) | 0.003 | 0.103 (0.023–0.462) |
Constant | < 0.001 | 0.095 | ||