Table 2 Comparison of labor progress among the three groups
|  | No-NA group (n = 165) | Early-NA group (n = 592) | Late-NA group (n = 340) | H | p value |
|---|---|---|---|---|---|
Duration of 1st stage of labour [min, Median(p25, p75)] | 215.0 (160.0, 290.0) | 300.0* (220.0, 420.0) | 280.0* (210.0, 390.0) | 61.422 | 0.000 |
Duration of 2nd stage of labour [min, Median(p25, p75)] | 10.0 (7.0, 13.0) | 12.0* (9.0, 18.0) | 13.0* (8.0, 18.0) | 37.020 | 0.000 |
Duration of 3rd stage of labour [min, Median(p25, p75)] | 7.0 (5.0, 10.0) | 6.0 (5.0, 9.0) | 6.5 (5.0, 9.0) | 5.105 | 0.078 |
Total duration of labour [min, Median(p25, p75)] | 230.0 (175.0, 315.0) | 325.0* (240.0, 445.0) | 304.0* (235.0, 411.0) | 63.238 | 0.000 |