Characteristic | n | Mean (S.D.) or proportion (%) |
---|---|---|
Age (yr) | 195 | 27.8 (4.6) |
Weight (kg) | 188 | 63.7 (8.7) |
Height (m) | 187 | 1.66 (0.06) |
Body mass index (kg/m2) | 187 | 23.0 (2.9) |
No cigarette smoking (%) | 151/195 | 77 |
Pregnant for the first time (%) | 79/194 | 41 |
Nulliparous (%) | 116/194 | 60 |
Number of previous pregnancies | 194 | 0.9 (0.9) |
Number of previous deliveries | 194 | 0.5 (0.7) |
Time since previous delivery (yr) | 78 | 3.3 (0.4) |
Previous back pain, not during pregnancy (%) | 113/195 | 58 |
Back pain in previous pregnancy (%) | 46/115 | 40 |