Table 5.
Indications of Caesarean section: hospital-based cohort
| Caesarean risk factor | With AS (n = 12) | Without AS (n = 22) | p valuea |
|---|---|---|---|
| Previous caesarean section | 4 (33.3) | 10 (45.5) | 0.719 |
| Breech delivery | 3 (25.0) | 3 (13.6) | 0.641 |
| Failure to progress | 1 (8.3) | 2 (9.1) | > 0.999 |
| Induction failure | 0 | 2 (9.1) | 0.529 |
| Previous uterine (obstetric) surgery | 1 (8.3) | 2 (9.1) | 0.983 |
| Placenta previa | 2 (16.7) | 0 | 0.118b |
| Foetal distress | 1 (8.3) | 3 (13.6) | > 0.999 |
| Maternal age (≥ 40 yr) | 1 (8.3) | 1 (4.5) | > 0.999 |
| Maternal obesity (BMI ≥ 30 kg/m2) | 0 | 2 (9.1) | 0.529b |
Values are presented as number (%).
AS, ankylosing spondylitis; BMI, body mass index.
a
p value calculated from regression models estimated using generalised estimating equations (GEEs) to account for the matched nature of the data.
b
p value calculated from Fisher’s exact test, because of zero events in either group in which GEE models do not converge.