| 叶酸代谢风险 | uRPL组(N = 230) | 对照组(N = 230) | P |
| 未发现风险 | 68 (29.6%) | 53 (23.0%) | 0.123 |
| 低度风险 | 109 (47.4%) | 115 (50.0) |
|
| 中度风险 | 48 (20.9%) | 57 (24.8%) |
|
| 高度风险 | 5 (2.2%) | 5 (2.2%) |
|