Table 3. Association between birth weight and endometriosis.
| Birth weight (g) | ≤ 2,500 | 2,501–4,000 | > 4,000 |
|---|---|---|---|
| All endometriosis (N = 368) | |||
| N (%) | 53 (14.4) | 304 (82.6) | 11 (3.0) |
| OR (95%CI) | 1.49 (0.95–2.33) | Reference | 0.52 (0.25–1.09) |
| aOR (95%CI) | 1.65 (1.04–2.62) | Reference | 0.49 (0.23–1.05) |
| SUP (N = 54) | |||
| N (%) | 6 (11.1) | 48 (88.9) | 0 |
| OR (95%CI) | 1.07 (0.43–2.66) | Reference | NA |
| aOR (95%CI) | 1.23 (0.47–3.21) | Reference | NA |
| OMA (N = 79) | |||
| N (%) | 10 (12.7) | 67 (84.8) | 2 (2.5) |
| OR (95%CI) | 1.27 (0.60–2.69) | Reference | 0.43 (0.10–1.87) |
| aOR (95%CI) | 1.52 (0.70–3.31) | Reference | 0.47 (0.10–1.89) |
| DIE (N = 235) | |||
| N (%) | 37 (15.8) | 189 (80.4) | 9 (3.8) |
| OR (95%CI) | 1.67 (1.02–2.73) | Reference | 0.68 (0.31–1.52) |
| aOR (95%CI) | 1.78 (1.08–2.94) | Reference | 0.63 (0.28–1.41) |
OR: odds ratio;
aOR: adjusted odds ratio; 95%CI: 95% confidence interval;
SUP: superficial endometriosis; OMA: endometrioma; DIE: deep infiltrating endometriosis;
Multivariate analysis has been adjusted for ethnicity and smoking status. Women with a birth weight between 2,501g and 4,000g served as a reference population.
NA: not applicable, no patient in this category.