| Birth weight (grams) | Cases | Controls | OR (95% CI) | P value | ||
| Yes n (%) | No n (%) | Yes n (%) | No n (%) | |||
| 1000 - 2400 | 11 (18.0) | 50 (82.0) | 9 (7.4) | 133 (92.6) | 0.49 (0.22 - 1.09) | 0.061 |
| 2500 - 3900 | 45 (73.8) | 7 (26.7) | 102 (83.6) | 20 (16.4) | 0.49 (0.22 - 1.09) | 0.061 |
| ≥4000 | 3 (4.9) | 58 (95.1) | 11 (9.0) | 111 (91.0) | 0.54 (0.14 - 2.00) | 0.266 |