Gestational age at delivery | Hypothyroid | P value | |
Overt N = 47 | Subclinical N = 283 | ||
28 to 34 weeks | 4 (8.5%) | 4 (1.4%) | 0.001 |
34 - 36 weeks 6 days | 10 (21.2%) | 28 (9.8%) | |
Term | 33 (70.2%) | 251 (88.6%) |