| Total | Group 1 | Group 2 | ||||
| normal fT4 & high TSH | low fT4 & normal TSH | |||||
| n | 469 | 51 | 102 | |||
| min Age | 17 | 22 | 17 | |||
| max Age | 44 | 41 | 44 | |||
| mean Age | 31.81 (17 - 44) | 31.35 (22 - 41) | 32.5 (17 - 44) | |||
| mean GA | 38 (25.6 - 41.3) | 37.9 (28.1 - 40.4) | 38.3 (30 - 41.1) | |||
| mean BW | 3105 (690 - 4880) | 3102 (690 - 4110) | 3283 (2230 - 4880) | |||
| mean miscarriages | 0.31 (0 - 4) | 0.24 (0 - 3) | 0.37 (0 - 3) | |||
| mean previous CS | 0.37 (0 - 3) | 0.25 (0 - 1) | 0.44 (0 - 2) | |||
| male | 241 | 51.40% | 24 | 47.10% | 56 | 54.90% |
| CS | 306 | 65.20% | 28 | 54.9 | 68 | 66.70% |
| Diabetic | 32 | 6.80% | 5 | 9.80% | 5 | 4.90% |
| Preeclampsia | 15 | 3.20% | 3 | 5.90% | 1 | 1% |
| Current Smoker | 34 | 7.30% | 1 | 2% | 6 | 5.90% |
| Previous Smoker | 38 | 8.10% | 5 | 9.80% | 8 | 7.80% |
| Non-smoker | 395 | 84.20% | 44 | 86.30% | 88 | 86.30% |
| Rh neg | 30 | 6.40% | 2 | 3.90% | 8 | 7.80% |