Pregnancies and Induced Abortions (Therapeutic and Elective) as Function of Radioiodine Exposure
| No. (%) of induced abortions | Age (y) at conception (mean ± SD) | No. (%) with: | |||
|---|---|---|---|---|---|
| Factor (overall population) | No. of pregnancies | Alcohol intake | Smoking habit | ||
| Before any treatment | 2,078 | 221 (11) | 27 ± 6 | 158 (8) | 238 (11) |
| After surgery for differentiated thyroid carcinoma | 595 | 120 (20) | 95 (16) | 71 (13) | |
| Cumulative radioiodine activity (MBq) before conception (mean ± SD) | |||||
| 0 | 112 | 26 (23) | 30 ± 5 | 12 (11) | 14 (13) |
| <370 (185 ± 77) | 197 | 45 (23) | 31 ± 6 | 41 (22) | 29 (15) |
| 370–3,700 (2,257 ± 1,147) | 74 | 15 (20) | 30 ± 5 | 7 (10) | 8 (11) |
| >3,700 (8,066 ± 5,735) | 212 | 34 (16) | 31 ± 6 | 35 (17) | 20 (9) |
| Radioiodine activity during year before conception (MBq) | |||||
| 0 | 437 | 71 (16) | 32 ± 6 | 62 (15) | 58 (13) |
| <370 | 124 | 31 (25) | 30 ± 6 | 26 (22) | 12 (10) |
| ≥370 | 34 | 18 (50)* | 29 ± 6 | 7 (21) | 1 (3) |
↵* P < 0.05, as determined by χ2 test for heterogeneity.