Table 2. Comparison of maternal and neonatal clinical characteristics in infants with normal 1-min Apgar scores (≥7) vs low 1-min Apgar scores (<7).
| Characteristic | 1-min Apgar scores | P value | |
|---|---|---|---|
| Score ≥7 (n=10,211) | Score <7 (n=339) | ||
| Maternal characteristics | |||
| Age at delivery, mean (SD), years | 29.5 (4.7) | 29.2 (4.5) | 0.248 |
| Highest level of education attained, n (%) | 0.287 | ||
| Junior high school and below | 3420 (33.5) | 126 (37.2) | |
| College and higher | 4937 (48.3) | 150 (44.2) | |
| BMI during the week before delivery, n (%), kg/m2 | 0.002 | ||
| 18.5-23.9 | 1609 (20.9) | 27 (11.7) | |
| 24-27.9 | 4131 (53.6) | 133 (57.6) | |
| ≥28 | 1962 (25.5) | 71 (30.7) | |
| Gestational age, n (%), weeks | <0.001 | ||
| 37 0/7-38 6/7 | 3078 (30.1) | 62 (18.3) | |
| 39 0/7-40 6/7 | 6386 (62.5) | 232 (68.4) | |
| 41 0/7-41 6/7 | 747 (7.3) | 45 (13.3) | |
| Parity, n (%) | <0.001 | ||
| 1 | 4732 (46.3) | 206 (60.8) | |
| ≥2 | 5479 (53.7) | 133 (39.2) | |
| Pathological obstetrics, n (%) | <0.001 | ||
| No | 5154 (50.5) | 89 (26.3) | |
| Yes | 5057 (49.5) | 250 (73.7) | |
| Hb level during the week before delivery, n (%), g/L | 0.042 | ||
| <110 | 2943 (28.8) | 115 (33.9) | |
| ≥110 | 7268 (71.2) | 224 (66.1) | |
| First stage of labor, n (%), min | <0.001 | ||
| <12 | 9572 (93.7) | 294 (86.7) | |
| 12-20 | 603 (5.9) | 36 (10.6) | |
| >20 | 36 (0.4) | 9 (2.7) | |
| Second stage of labor, n (%), min | <0.001 | ||
| <60 | 9150 (89.6) | 213 (62.8) | |
| 60-120 | 899 (8.8) | 72 (21.2) | |
| >120 | 162 (1.6) | 54 (15.9) | |
| Forceps delivery or vacuum extraction, n (%) | <0.001 | ||
| No | 9896 (96.9) | 240 (70.8) | |
| Yes | 315 (3.1) | 99 (29.2) | |
| Neonatal characteristics | |||
| Weight, n (%), g | <0.001 | ||
| <3250 | 5073 (49.7) | 177 (52.2) | |
| 3250-4000 | 4859 (47.6) | 135 (39.8) | |
| ≥4000 | 279 (2.7) | 27 (8.0) | |
| Sex, n (%) | 0.172 | ||
| Male | 5550 (54.4) | 197 (58.1) | |
| Female | 4661 (45.5) | 142 (41.9) | |
| MSAF, n (%) | <0.001 | ||
| No | 7774 (76.1) | 186 (54.9) | |
| Yes | 2437 (23.9) | 153 (45.1) | |
| Admission to the neonatology department | <0.001 | ||
| No | 8997 (88.1) | 18 (5.3) | |
| Yes | 1214 (11.9) | 321 (94.7) | |
BMI: body mass index; Hb: hemoglobin; MSAF: meconium-stained amniotic fluid.