The characteristics of women's age at the first antenatal visit and body mass index (BMI) data in pre-pregnancy by different periods (1987–1989, 1996–1997, 2007–2010) in the Lithuanian urban area
| Characteristic | 1987–1989 (N=861, 30.5%) | 1996–1997 (N=995, 35.2%) | 2007–2010 (N=971, 34.3%) | p Value |
|---|---|---|---|---|
| Age at the first antenatal visit, mean±SD, years | 25.6±5.16 | 25.26±4.88 | 28.37±5.51 | <0.001 |
| Age at the first antenatal visit, n (%) | ||||
| 18–24 years | 429 (49.8) | 504 (50.7) | 255 (26.3) | <0.05 |
| 25–34 years | 375 (43.6) | 435 (43.7) | 580 (59.7) | <0.05 |
| 35–44 years | 57 (6.6) | 56 (5.6) | 136 (14.0) | <0.05 |
| Height, mean±SD, cm | 1.65±0.05 | 1.66±0.05 | 1.67±0.06 | <0.001 |
| Weight, mean±SD (range), kg | 65.28±10.79 (44–123.9) | 61.68±9.88 (40–117) | 64.87±12.90 (42–127) | <0.001 |
| BMI, mean±SD, kg/m2 | 23.9±3.68 | 22.14±3.36 | 23.05±4.32 | <0.001 |
| BMI (kg/m2), n (%) | ||||
| <18.5 | 21 (2.4) | 82 (8.2) | 81 (8.3) | <0.05 |
| 18.5–24.9 | 580 (67.4) | 746 (75) | 659 (67.9) | <0.05 |
| 25–29.9 | 200 (23.2) | 136 (13.7) | 156 (16.1) | <0.05 |
| 30–34.9 | 52 (6.0) | 26 (2.6) | 53 (5.5) | <0.05 |
| 35–39.9 | 6 (0.7) | 3 (0.3) | 19 (2.0) | <0.05 |
| ≥40 | 2 (0.2) | 2 (0.2) | 3 (0.3) | >0.05 |