Table 2.
Characteristics of nulliparous women with spontaneous labor onset and a trial of labor who gave birth to a single, cephalic-presenting fetus at term gestation between 2006 and 2010 at The Ohio State University Wexner Medical Center (N= 2573)
| Characteristic | n (%) or median [5th, 95th percentile] |
|---|---|
| Maternal age (year) | 25 [17, 35] |
| Race | |
| White, non- Hispanic | 1229 (47.1%) |
| Black, non- Hispanic | 765 (29.3%) |
| Hispanic | 244 (9.4%) |
| Asian/Pacific Islander | 216 (8.3%) |
| Others | 154 (5.9%) |
| Education (highest level) | |
| Postgraduate degree | 411 (15.8%) |
| College graduate | 647 (24.8%) |
| High school graduate | 825 (31.6%) |
| High school not completed | 518 (19.9%) |
| Not reported | 207 (7.9%) |
| Marital status | |
| Married | 1356 (52.0%) |
| Not married | 1252 (48.0%) |
| Health insurance | |
| Private | 1376 (52.7%) |
| Public | 1128 (43.2%) |
| Other | 104 (4.0%) |
| Body mass index at labor admission (kg/m2) | 28.5 [23.0, 39.9] |
| Cervical dilation at admission (cm) | 3.5 [1.0, 7.0] |
| Cervical effacement at admission (%) | 80 [50, 100] |
| Fetal station at admission | −2 [−3, 0] |
| Amniotomy | 1454 (56.5%) |
| Oxytocin augmentation used | 1333 (51.1%) |
| Epidural analgesia used during labor | 2221 (85.2%) |
| Fetal scalp electrode used | 1364 (52.3%) |
| Intrauterine contraction monitor used | 1361 (52.2%) |
| Number of cervical exams during labor | 6 [3, 11] |
| Mode of birth | |
| Vaginal—spontaneous | 1937 (74.3%) |
| Vaginal—instrumental | 336 (12.9%) |
| Cesarean | 335 (12.8%) |
| First stage duration in hospital (h)a | 8.3 [1.6, 17.6] |
| Second stage duration (min)b | 56 [11, 201] |
| Third stage duration (min)b | 4 [1, 13] |
| Duration of membrane rupture (h) | 6.9 [0.9, 20.3] |
| Gestational age at birth (wk) | 39.4 [37.4, 40.6] |
| Birthweight (g) | 3259 [2598, 3975] |
Percentages may not add to 100% as a result of rounding.
a
Includes only women reaching complete dilatation.
b
Includes only women birthing vaginally.