Table 2.
The relationship between obstetric events and wilms tumor.
| Case No. (%) |
Control No. (%) |
Model 1 | Model 2 | |||
|---|---|---|---|---|---|---|
| ORa | 95% CIa | ORa | 95% CIa | |||
| Ultrasound b | ||||||
| In 3 trimesters | 127 (24) | 129 (25) | 1. | -- | 1. | -- |
| In 2 trimesters | 205 (39) | 209 (41) | 1.1 | 0.7, 1.4 | 1.0 | 0.7, 1.4 |
| In 1 trimester | 170 (33) | 160 (31) | 1.1 | 0.8, 1.6 | 1.1 | 0.8, 1.6 |
| None | 17 (3) | 16 (3) | 1.2 | 0.6, 2.4 | 0.8 | 0.4, 1.8 |
| Amniocentesis b | ||||||
| No | 471 (91) | 462 (90) | 1. | -- | 1. | -- |
| Yes | 49 (9) | 52 (10) | 0.9 | 0.6, 1.4 | 0.9 | 0.6, 1.4 |
| Chorionic Villis Sampling b | ||||||
| No | 513 (99) | 504 (98) | 1. | -- | 1. | -- |
| Yes | 6 (1) | 10 (2) | 0.6 | 0.2, 1.7 | 0.6 | 0.2, 1.8 |
| Morning sickness b | ||||||
| No | 149 (29) | 142 (27) | 1. | -- | 1. | -- |
| Yes without vomiting at all | 126 (24) | 148 (29) | 0.8 | 0.6, 1.1 | 0.8 | 0.6, 1.1 |
| Yes with vomiting | 244 (47) | 226 (44) | 1.0 | 0.8, 1.4 | 1.0 | 0.8, 1.4 |
| Hand swelling b | ||||||
| No | 263 (51) | 262 (51) | 1. | -- | 1. | -- |
| Yes | 255 (49) | 254 (49) | 1.0 | 0.8, 1.3 | 1.0 | 0.8, 1.3 |
| Proteinuria/preeclampsia b | ||||||
| No | 430 (87) | 437 (89) | 1. | -- | 1. | -- |
| Preeclampsia | 18 (4) | 16 (3) | 1.2 | 0.6, 2.3 | 1.5 | 0.7, 3.2 |
| Proteinuira | 26 (5) | 24 (5) | 1.1 | 0.6, 1.9 | 1.2 | 0.6, 2.1 |
| Both | 19 (4) | 14 (3) | 1.4 | 0.7, 2.8 | 1.4 | 0.7, 2.9 |
| Vaginal bleeding b | ||||||
| No | 431 (83) | 424 (82) | 1. | -- | 1. | -- |
| Yes | 89 (17) | 91 (18) | 1.0 | 0.7, 1.3 | 0.9 | 0.6, 1.2 |
| Threatened miscarriage b | ||||||
| No | 483 (93) | 471 (92) | 1. | -- | 1. | -- |
| Yes | 37 (7) | 43 (8) | 0.9 | 0.5, 1.3 | 0.8 | 0.5, 1.4 |
| Vaccination during pregnancy b | ||||||
| No | 502 (97) | 498 (97) | 1. | -- | 1. | -- |
| Yes | 14 (3) | 16 (3) | 0.8 | 0.4, 1.7 | 0.9 | 0.4, 1.8 |
| Labor induction b | ||||||
| No | 280 (54) | 303 (59) | 1. | -- | 1. | -- |
| Yes | 239 (46) | 210 (41) | 1.2 | 1.0, 1.6 | 1.4 | 1.1,1.8 |
| Anesthetic or pain medication during labor b |
||||||
| No | 121 (23) | 135 (26) | 1. | -- | 1. | -- |
| Yes | 395 (77) | 379 (74) | 1.2 | 0.9, 1.6 | 1.3 | 1.0, 1.8 |
| Delivery type b | ||||||
| Vaginal delivery | 393 (76) | 399 (77) | 1. | -- | 1. | -- |
| C-section | 127 (24) | 116 (23) | 1.1 | 0.8, 1.5 | 1.1 | 0.8, 1.5 |
| Reason for C-section b | ||||||
| Vaginal delivery | 393 (76) | 399 (78) | 1. | -- | 1. | -- |
| C-section because of previous c-section |
35 (7) | 42 (8) | 0.9 | 0.5, 1.4 | 0.9 | 0.5, 1.4 |
| C-section because of other reasons |
92 (18) | 74 (14) | 1.3 | 0.9, 1.8 | 1.3 | 0.9, 1.8 |
Odds Ratios and 95% Confidence Intervals adjusted for child’s age at reference date and geographic region of residence (matching factors)in Model 1. Model 2 is additionally adjusted for child’s sex, maternal education and household income at birth.
Missing numbers: 2 cases and 3 controls for ultrasound/ sonogram examination; 1 cases and 3 controls for amniocentesis; 2 cases and 3 controls for CVS; 2 cases and 1 control for morning sickness; 3 cases and 1 control for hand swelling; 28 cases and 26 controls for proteinuria or preeclampsia; 1 cases and 2 controls for vaginal bleeding; 1 cases and 3 controls for threatened m iscarriage.5 cases and 3 control for vaccination during pregnancy; 2 cases and 4 controls for labor induction; 5 cases and 3 controls for anesthetic or pain medication during labor; 1 cases and 2 controls for delivery type.