Table 4. Multivariate-adjusted odds ratios (ORs) of late age-related macular degeneration (AMD) for reproductive risk factors in postmenopausal women in the KNHANES 2010–2012.
| Risk factors | Increment | OR | 95% CI | P Value | |
| Model 1 | Age | 1 year | 1.12 | 1.06–1.17 | <0.001 |
| Number of pregnancy | 1 | 0.82 | 0.53–1.28 | 0.386 | |
| Number of parity | 1 | 1.11 | 0.61–2.02 | 0.725 | |
| Duration of lactationa | 6 months | 0.92 | 0.85–1.00 | 0.043 | |
| Duration of OCP usea | 6 months | 1.10 | 1.02–1.19 | 0.013 | |
| Model 2b | Age | 1 year | 1.12 | 1.06–1.18 | <0.001 |
| Duration of lactationa | 6 months | 0.91 | 0.86–0.95 | <0.001 | |
| Duration of OCP usea | 6 months | 1.10 | 1.02–1.18 | 0.019 |
CI = confidence interval; OCP = oral contraceptive pills.
a
Total years of experience.
b
Final multivariate model consisted of risk factors of p value<0.05.