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Table 4 Clinical characteristics of controls and cases

From: Cervical collagen and biomechanical strength in non-pregnant women with a history of cervical insufficiency

  Control CI
Total number 57 22
Age (years)
mean ± SD
38.3 ± 5.1 34.0 ± 5.3*
Parity (numbers of births)
mean ± SD
2.3 ± 1.0 1.7 ± 1**
Spontaneous abortions (<week 16) 35% 45%
Spontaneous abortions 16 to 23+6 weeks 2% 59%
Termination of pregnancy
(before week 12)
46% 27%
Cesarean section 19% 41%
Cerclage 0 95%
  1. Percentage of women who experienced one or more i.e. abortions
  2. *p = 0.02 against control
  3. **p = 0.012 against control