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Maternal factors in both treatment groups
| Factors | Nifedipine (200) | Isoxsuprine (200) |
|---|---|---|
| Mean age (years) | 24.7 | 25.6 |
| Parity | ||
| Primigravidae (n) | 96 | 90 |
| Multigravidae (n) | 104 | 110 |
| Cases in subgroup A | ||
| Uterine cont <30 s & Cx dilatation <2 cm | 124 | 120 |
| Cases in subgroup B | ||
| Uterine cont >30 s or Cx dilatation >2 cm | 76 | 80 |
| Mean cervical effacement (%) | 62 | 65 |
| Rupture of membranes (n) | 32 | 30 |
