Table 1 Characteristics of a group of 872 women who delivered at term (≥37 weeks of gestation), comparing spontaneous deliveries and operative vaginal deliveries or secondary CS. Primary CS’s were excluded
All deliveries (872) | Spontaneous deliveries (747) | Operative deliveries (125) | p-value | ||||
|---|---|---|---|---|---|---|---|
Mean (SD) N(%) | Mean (SD) N(%) | Mean (SD) N(%) | t-test X2 | ||||
Age ≥35 yrs | 30.5(3.6) | 30.6 (3.7) | 30.0 (3.4) | 0.08 | |||
Low education | 69 (8) | 62 (8) | 7 (6) | 0.47 | |||
BMI before pregnancy(kg/m2) | 25.2(4.3) | 25.0 (4.2) | 26.3(4.7) | 0.002 | |||
Primiparity | 366(42) | 268(36) | 98 (78) | <0.001 | |||
Miscarriage in obstetric history | 164(19) | 148(20) | 16 (13) | 0.06 | |||
Smoking | 108(12) | 89 (12) | 19 (15) | 0.30 | |||
Thyroid function | |||||||
12 weeks gestation | |||||||
TSH (mIU/L) | 1.30 (2.97) | 1.21(0.80) | 1.88 (0.76) | 0.33 | |||
FT4 (pmol/L) | 16.2 (2.5) | 16.2 (2.5) | 16.2 (2.5) | 0.98 | |||
24 weeks gestation | |||||||
TSH (mIU/L) | 1.33 (0.69) | 1.32(0.65) | 1.45(0.89) | 0.11 | |||
FT4 (pmol/L) | 13.9 (2.0) | 13.9 (2.0) | 13.7 (1.8) | 0.20 | |||
36 weeks gestation | |||||||
TSH (mIU/L) | 1.49 (0.75) | 1.46(0.73) | 1.63(0.86) | 0.025 | |||
FT4 (pmol/L) | 13.3 (2.2) | 13.4 (2.2) | 12.9 (2.1) | 0.007 | |||
TPO-Ab >35 IU/mL | 75 (8.6) | 60 (8.0) | 15(12.0) | 0.14 | |||
Family history thyroid dysfunction | 158(18) | 137(18) | 21 (17) | 0.80 | |||
Neonatal outcome: | |||||||
Term at delivery (wks) | 39.9(1.1) | 39.8 (1.1) | 40.3 (1.0) | <0.001 | |||
Birth weight (gr) | 3545(457) | 3539(457) | 3582(454) | 0.33 | |||
Male offspring | 451(52) | 380(51) | 71(57) | 0.20 | |||