Variable | Mean ± SD | Range |
Maternal age (years) | 30.42 ± 4.85 | 20 - 43 |
History of live births | 0.1 ± 0.3 | 0 - 1 |
Number of previous miscarriages | 2. 37 ± 1.35 | 0 - 7 |
Gestation at cerclage (weeks) | 16.2 ± 3.23 | 12.00 - 26.57 |
Cervical length (cm) | 2.83 ± 0.90 | 0.00 - 4.60 |
Cervical dilatation (cm) | 1.54 ± 0.71 | 0.4 - 2.5 |