Table 1 Clinical characteristics
| Period 0 (n = 328) | Period 1 (n = 370) | Period 2 (n = 376) | All N = 1074 | ||
|---|---|---|---|---|---|
| Age, years§ | 31 (5) | 31 (5) | 30 (5) | 31 (5) |
pa NS pb < 0.05 pc NS |
| BMI ≥ 30 | 24 (9) | 42 (12) | 37 (10) | 103 (10) | NS |
| Height cm ≤ 1,55 | 9 (3) | 27 (7) | 20 (5) | 56 (6) |
pa < 0.05 pb NS pc NS |
| Nulliparous | 264 (80) | 297 (80) | 294 (78) | 855 (80) | NS |
| GL, days# | 283 (276–289) | 283 (276–288) | 280 (273–287) | 281 (275–287) |
pa NS pb < 0.01 pc < 0.01 |
|
Duration 1st stage min median# | 480 (300–690) | 540 (360–750) | 480 (300–660) | 510 (330–690) |
pa < 0.05 pb < 0.01 pc NS |
|
Duration 2nd stage min median# | 120 (60–210) | 150 (60–210) | 165 (90–230) | 150 (60–210) |
pa < 0.05 pb NS pc < 0.01 |
| Epidural | 245 (75) | 283 (77) | 297 (79) | 825 (77) | NS |
| Oxytocin | 304 (93) | 348 (94) | 354 (94) | 1006 (94) | NS |
| Indication dystocia | 168 (51) | 227 (62) | 202 (54) | 597 (56) |
pa < 0.01 pb < 0.05 pc NS |
| Fetal head station mid | 190 (58) | 248 (68) | 231 (61) | 678 (62) |
Pa < 0.01 pb NS pc NS |
| Birthweight ≥ 4500 g | 10 (3) | 15 (4) | 9 (2) | 34 (3) | NS |
| Position non-OAP | 37 (11) | 52 (14) | 54 (15) | 143 (13) | NS |
| Duration > 15 min* | 15 (5) | 44 (12) | 21 (6) | 80 (7) |
pa < 0.01 pb < 0.01 pc NS |
| Nr pulls > 6* | 34 (11) | 43 (12) | 23 (6) | 100 (10) |
pa NS pb < 0.01 pc < 0.05 |
| Cup detachment > 1* | 24 (7) | 15 (4) | 10 (3) | 49 (5) |
pa NS pb NS pc < 0.01 |