Table 1.
Duration of latent phase, nulliparous and parous women.
|
Nulliparous women | |||||||
|---|---|---|---|---|---|---|---|
| Study | N | Study quality | Cervical dilatation on admission (cm) | Definition of starting and ending reference points | Median duration (h) | 5th percentile (h) | 95th percentile (h) |
| Peisner 1983a36 | 1544 | A | 0.5** | Reported onset of contractions until slope of labour record > 1.2 cm/h | 7.5 | – | – |
| Ijaiya 2009a26 | 75 | B | 5** | Duration of labour before presentation | 6.0 | – | – |
| Mean duration (h) | SD (h) | +2SD (h) | |||||
| Juntunen 1994a29 | 42 | B | NR | Not defined | 5.1 | 3.2 | 11.5 |
| Velasco 1985a43 | 74 | B | NR | From admission until 4 cm | 7.1 | 1.6 | 10.3 |
| Parous women | |||||||
| Peisner 1983b36(P = 1) | 720 | A | 4.5** | Reported onset of contractions until slope of labour record > 1.5 cm/h | 5.5 | – | – |
| Peisner 1983c36(P ≥ 1) | 581 | A | 4.5** | Reported onset of contractions until slope of labour record > 1.5 cm/h | 4.5 | – | – |
| Ijaiya 2009b26 | 163 | B | 6** | Duration of labour before presentation | 5.0 | – | – |
| Mean duration (h) | SD (h) | +2SD (h) | |||||
| Juntunen 1994b29(P = 2/3) | 42 | B | NR | Not defined | 3.2 | 2.3 | 7.8* |
| Juntunen 1994c29(P > 3) | 42 | B | NR | Not defined | 2.2 | 1.6 | 5.4* |
| Velasco 1985b43 | 37 | B | NR | From admission until 4 cm | 5.7 | 1.5 | 8.7* |
*
Estimated by authors.
**
Median; P = Parity.