Table 1 Characteristics of women with miscarriage, spontaneous delivery: preterm, term and postterm
From: Physical fitness, serum relaxin and duration of gestation
Miscarriage (<141 days) | Preterm birth (141-158 days) | Term birth (159–293 days) | Postterm birth (>293 days) | |||||
|---|---|---|---|---|---|---|---|---|
Characteristic | n | Mean (C.I.)/Proportion (%) | n | Mean (C.I.)/Proportion (%) | n | Mean (C.I.)/Proportion (%) | n | Mean (C.I.)/Proportion (%) |
Age (yr) | 20 | 30.4 (27.9–32.8) | 28 | 28.8 (27.1–30.5) | 401 | 28.7 (28.3–29.1) | 31 | 30.5 (28.7–32.4) |
Weight (kg) | 20 | 68.1 (63.8–72.5) | 28 | 69.2 (64.1–74.3) | 401 | 67.8 (66.6–69.0) | 31 | 68.6 (62.6–74.6) |
Height (m) | 20 | 1.66 (1.63–1.68) | 28 | 1.65 (1.63–1.67) | 401 | 1.67 (1.66–1.67) | 31 | 1.66 (1.63–1.68) |
No previous pregnancy | 3 | 15 | 10 | 35.7 | 176 | 43.9 | 15 | 48.4 |
No previous delivery | 5 | 25 | 11 | 39.3 | 206 | 51.4 | 19 | 61.3 |
> one previous delivery | 4 | 20 | 1 | 3.6 | 47 | 11.7 | 3 | 9.7 |
Education, completed university studies | 8 | 40 | 10 | 35.7 | 185 | 46.1 | 12 | 38.7 |
Current smoker or quit before 6 months ago | 3 | 15 | 6 | 21.4 | 78 | 19.4 | 3 | 9.7 |
Absolute \( \dot{V}{O}_2 \) peak, est. (l/min) | 20 | 2.61 (2.35–2.89) | 28 | 2.31 (2.15–2.47) | 401 | 2.44 (2.39–2.48) | 31 | 2.49 (2.28–2.69) |
Serum relaxin (ng/l) | 20 | 640 (511–768) | 28 | 792 (565–1020) | 392 | 767 (728–806) | 31 | 687 (598–776) |
Duration of gestation (days) | 20 | 98 (88–108) | 28 | 247 (244–250) | 401 | 280 (279–281) | 31 | 297 (296–297) |
Multiple pregnancy | - | - | 4 | 14.3 | 2 | 0.5 | 0 | - |
Caesarean section | - | - | 3 | 10.7 | 20 | 5.0 | 7 | 22.6 |