Table 1.
Descriptive statistics of the study population. Sample size is expressed in % and all other values as mean (±SD)
| Included singleton viable pregnancies (Oct. 2009 – May 2018) n= 9064 | |
|---|---|
| Maternal age, years | 30.1 (±4.6) |
| Gestational age at inclusion, weeks | 12.8 (±0.6) |
| Mean crown-rump length, mm | 68.29 (±8.08) |
| Mean nuchal translucency, mm | 1.89 (±0.49) |
| Maternal weight, kg | 63.26 (±12.09) |
| Maternal height, cm | 164.77 (±6.08) |
| Maternal BMI, kg/m2 | 23.3 (±4.16) |
| BMI categories, kg/m2 (n, %) | |
| < 18.5 (underweight) | 613 (6.76 %) |
| Severe thinness < 16 | 16 (0.17 %) |
| Moderate thinness 16 – 16.99 | 100 (1.10 %) |
| Mild thinness 17 – 18.49 | 497 (5.48 %) |
| 18.5 – 24.99 (normal weight) | 6016 (66.37 %) |
| 25 – 29.99 (overweight) | 1749 (19.26 %) |
| > 30 (obese) | 686 (7.56 %) |
| Obese class I 30.00 - 34.99 | 540 (5.95 %) |
| Obese class II 35.00 - 39.99 | 117 (1.26 %) |
| Obese class III ≥ 40 | 29 (0.31 %) |
| Blood pressure in mmHg n = 3650 | |
| Systolic | 115.9 (±9.7) |
| Diastolic | 72.7 (±8.16) |
| Mean arterial pressure | 87.1 (±7.95) |
| Parity (n, %) | |
| Nulliparous | 4406 (48.60 %) |
| Primipara | 3660 (40.37 %) |
| Para-two | 846 (9.33 %) |
| Para three or more | 152 (1.67 %) |
| Conception (n, %) | |
| Spontaneous | 8872 (97.88 %) |
| IVF/ICSI | 123 (1.35 %) |
| Ovulation induction w/o IVF | 69 (0.76 %) |
SD – standard deviation; BMI – body mass index; kg – kilograms; cm – centimetres; m2 – squared meters; IVF – in vitro fertilization; ICSI – intracellular sperm injection.