Table 2 Adjusted Odds Ratio (aOR) between Primary FET vs. fresh on LBR stratified by age groups
Age (years) | N | Adjusted Odds Ratio (95% CI; p value) |
|---|---|---|
< 35 | 133,096 | 1.24 (1.19–1.29, p < 0.001) |
35–37 | 47,433 | 1.24 (1.16–1.33, p < 0.001) |
38–40 | 30,211 | 1.43 (1.31–1.58, p < 0.001) |
41–42 | 11,107 | 1.53 (1.27–1.84, p < 0.001) |
> 42 | 6324 | 1.98 (1.36–2.88, p < 0.001) |