Table 4 Bivariate associations of type of ART with risk of ARM
Group | Population-based controls N (%) | All ARM cases | Prospectively collected ARM cases in 2009 to 2011 | |||||
|---|---|---|---|---|---|---|---|---|
N (%) | OR (95% CI) | P value | N (%) | OR (95% CI) | P value | |||
ART | No | 9,940,004 (99%) | 265 (90%) | 1.0 (Reference) | - | 121 (90%) | 1.0 (Reference) | - |
IVF | 44,844 (0.4%) | 13 (4%) | 10.9 (6.2–19.0) | <0.0001 | 6 (4%) | 11.0 (4.8–25.0) | <0.0001 | |
ICSI | 85,138 (0.9%) | 17 (6%) | 7.5 (4.6–12.2) | <0.0001 | 8 (6%) | 7.7 (3.8–15.8) | <0.0001 | |