Table 2.
General and obstetric characteristics and intrapartum care of women with an OPP of fetal head at first stage of labor according to retrospective and prospective OPP sub-cohorts
| Overall OPP sub-cohorts (N=798) | Retrospective OPP sub-cohort (N=524) | Prospective OPP sub-cohort (N=274) | p | ||||
|---|---|---|---|---|---|---|---|
| General characteristics | |||||||
| Mean | SD | Mean | SD | Mean | SD | ||
| Maternal age (years) | 32.3 | 5.2 | 32.4 | 5.3 | 32.2 | 4.8 | 0.483 |
| n | % | n | % | n | % | ||
| Maternal age ≥35 years | 232 | 34.9 | 160 | 37.2 | 72 | 30.6 | 0.089 |
| Ethnicity (not Caucasian) | 116 | 14.5 | 76 | 14.5 | 40 | 14.6 | 0.971 |
| Obstetric characteristics | |||||||
| Nulliparous | 469 | 58.8 | 296 | 56.5 | 173 | 63.1 | 0.070 |
| Previous CS | 59 | 7.4 | 45 | 8.6 | 14 | 5.1 | 0.075 |
| Uncomplicated pregnancy | 565 | 70.8 | 423 | 80.7 | 142 | 51.8 | <0.001 |
| Mean | SD | Mean | SD | Mean | SD | ||
| Gestational age (weeks) | 39.6 | 1.2 | 39.7 | 1.2 | 39.4 | 1.2 | <0.001 |
| n | % | n | % | n | % | ||
| Late/post-term pregnancy | 207 | 25.9 | 152 | 29.0 | 55 | 20.7 | 0.006 |
| Spontaneous onset of labor | 576 | 72.2 | 381 | 72.7 | 195 | 71.2 | 0.644 |
| Intrapartum care | |||||||
| Epidural analgesia | 307 | 38.5 | 176 | 33.6 | 131 | 47.8 | <0.001 |
| OX in labor | 102 | 12.8 | 61 | 11.6 | 41 | 15.0 | 0.182 |
OPP: occiput posterior position. CS: cesarean section. OX: oxytocin. Uncomplicated pregnancy is defined as a pregnancy in a woman with no chronic conditions or gestational complications. Late/post-term pregnancy is defined as a gestational age between 41 0/7 weeks and 42 0/7 weeks of gestation.