Table 4. Duration of labour from one level of cervical dilatation to the next with and without augmented labours.
| Parity = 0 | ||||||
| All women | All women w/o oxytocin | Difference in median times | All women | All women w/o oxytocin | Difference in median times | |
| N | 2,100 | 1,300 | 2,166 | 1,300 | ||
| Cervical dilatation | Survival analysis† | Survival analysis† | Markov model | Markov model | ||
| 3–4 cm | 2.82 (0.60, 13.33) | 2.47 (0.47, 13.14) | 0.35 | 1.83 (0.08, 8.17) | 1.75 (0.08, 7.67) | 0.08 |
| 4–5 cm | 1.72 (0.38, 7.83) | 1.35 (0.24, 7.57) | 0.37 | 1.58 (0.08, 7.08) | 1.67 (0.08, 7.25) | −0.09 |
| 5–6 cm | 1.19 (0.23, 6.17) | 1.01 (0.19, 5.38) | 0.18 | 0.83 (0.00, 3.83) | 0.75 (0.00, 3.42) | 0.08 |
| 6–7 cm | 0.66 (0.09, 4.92) | 0.46 (0.05, 4.12) | 0.20 | 0.92 (0.00, 4.25) | 0.92 (0.00, 4.00) | 0.00 |
| 7–8 cm | 0.25 (0.02, 3.10) | 0.16 (0.01, 2.84) | 0.09 | 0.58 (0.00, 2.50) | 0.58 (0.00, 2.50) | 0.00 |
| 8–10 cm | 0.87 (0.18, 4.19) | 0.76 (0.14; 4.20) | 0.11 | 0.75 (0.00, 3.33) | 0.75 (0.00, 3.50) | 0.00 |
| Parity = 1 | ||||||
| N | 1,488 | 1,044 | 1,488 | 1,044 | ||
| Cervical dilatation | Survival analysis† | Survival analysis† | Markov model | Markov model | ||
| 3–4 cm | 2.42 (0.41, 14.18) | 2.39 (0.50, 11.49) | 0.03 | 1.92 (0.08, 8.33) | 1.83 (0.08, 7.92) | 0.09 |
| 4–5 cm | 1.37 (0.25, 7.65) | 0.82 (0.11, 6.38) | 0.55 | 1.42 (0.08, 6.42) | 1.17 (0.08, 5.33) | 0.25 |
| 5–6 cm | 0.79 (0.13, 4.95) | 0.64 (0.10, 4.17) | 0.15 | 0.83 (0.00, 3.58) | 0.75 (0.00, 3.17) | 0.08 |
| 6–7 cm | 0.33 (0.03, 3.67) | 0.30 (0.03, 3.15) | 0.03 | 0.75 (0.00, 3.50) | 0.75 (0.00, 3.42) | 0.00 |
| 7–8 cm | 0.09 (0.00, 2.69) | 0.05 (0.00, 2.48) | 0.04 | 0.42 (0.00, 1.83) | 0.33 (0.00, 1.75) | 0.09 |
| 8–10 cm | 0.64 (0.11, 3.56) | 0.62 (0.12, 3.23) | 0.02 | 0.67 (0.00, 2.92) | 0.58 (0.00, 2.58) | 0.09 |
| Parity = 2+ | ||||||
| N | 1,952 | 1,430 | 1,952 | 1,430 | ||
| Cervical dilatation | Survival analysis† | Survival analysis† | Markov model | Markov model | ||
| 3–4 cm | 2.35 (0.31, 17.85) | 1.90 (0.27, 13.50) | 0.45 | 2.17 (0.08, 9.75) | 1.75 (0.08, 7.58) | 0.42 |
| 4–5 cm | 1.18 (0.17, 8.05) | 0.83 (0.11, 6.54) | 0.35 | 1.50 (0.08, 6.50) | 1.33 (0.08, 5.83) | 0.17 |
| 5–6 cm | 0.79 (0.10, 6.24) | 0.61 (0.07, 5.51) | 0.18 | 0.75 (0.00, 3.33) | 0.67 (0.00, 2.92) | 0.08 |
| 6–7 cm | 0.31 (0.03, 3.29) | 0.25 (0.02, 2.71) | 0.06 | 0.83 (0.00, 3.58) | 0.75 (0.00, 3.50) | 0.08 |
| 7–8 cm | 0.17 (0.01, 2.44) | 0.16 (0.01, 2.52) | 0.01 | 0.33 (0.00, 1.50) | 0.33 (0.00, 1.58) | 0.00 |
| 8–10 cm | 0.68 (0.12, 3.77) | 0.69 (0.12, 4.15) | −0.01 | 0.50 (0.00, 2.50) | 0.50 (0.00, 2.42) | 0.00 |
Data presented as median hours (5th, 95th percentiles).
† Survival analysis with complete and interval-censored values
Abbreviation: w/o, without.