TABLE 2

Infant Demographic Characteristics and Clinical Conditions

VariableInpatientEDTotal Sample (N = 4112)
Rehospitalized (n = 452)Not Rehospitalized (n = 3660)Visit (n = 1680)No Visit (n = 2432)
Gestational age, wk37.4 ± 3.338.4 ± 2.5*38.2 ± 2.538.3 ± 2.738.3 ± 2.6
Preterm (<37 wk)102 (22.6)409 (11.2)*220 (13.1)291 (12.0)511 (12.4)
Birth weight, g2956 ± 7943158 ± 640*3131 ± 6443140 ± 6733136 ± 661
Birth weight group
 >4000 g22 (4.9)210 (5.7)89 (5.3)143 (5.9)232 (5.6)
 <2500 g94 (20.8)399 (10.9)*214 (12.7)279 (11.5)493 (12.0)
 <1500 g30 (6.6)103 (2.8)*52 (3.1)81 (3.3)133 (3.2)
5-min Apgar score ≤515 (3.3)61 (1.7)*18 (1.1)58 (2.4)*76 (1.8)
Sex (% female)201 (44.5)1821 (49.8)*786 (46.8)1236 (50.8)2022 (49.2)
Race/ethnicity
 black231 (51.1)1990 (54.4)949 (56.5)1272 (52.3)*2221 (54)
 White156 (34.5)1108 (30.3)457 (27.2)807 (33.2)*1264 (30.7)
 Othera65 (14.3)562 (15.3)274 (16.3)353 (14.5)*627 (15.2)
Birth season
 Winter102 (22.6)939 (25.7)422 (25.1)619 (25.5)1041 (25.3)
 Spring96 (21.2)840 (23.0)337 (20.1)599 (24.6)936 (22.8)
 Summer124 (27.4)960 (26.2)455 (27.1)629 (25.9)1084 (26.4)
 Fall130 (28.8)912 (25.2)466 (27.7)585 (24.1)1051 (25.6)
Cesarean delivery172 (38.1)1186 (32.4)*599 (35.7)759 (31.2)*1358 (33.0)
Initial hospital LOS (days, mean/SD)5.9 ± 15.922.1 ± 8.46*3.0 ± 11.32.2 ± 8.3*2.5 ± 9.6
NICU admission153 (33.8)663 (18.1)*341 (20.3)475 (19.5)816 (19.8)
Jaundice102 (22.6)660 (18.0)*313 (18.6)449 (18.5)762 (18.5)
Mechanical ventilation70 (15.5)276 (7.5)*159 (9.5)187 (7.7)*346 (8.4)
Sepsis32 (7.1)88 (2.4)*55 (3.3)65 (2.7)120 (2.9)
Bronchopulmonary dysplasia17 (3.8)52 (1.4)*32 (1.9)37 (1.5)69 (1.7)
Apnea35 (7.7)70 (1.9)*50 (3.0)55 (2.3)105 (2.6)
Neonatal abstinence syndrome16 (3.5)142 (3.9)65 (3.9)93 (3.8)158 (3.8)
Cord prolapse25 (5.5)120 (3.3)*64 (3.8)81 (3.3)145 (3.5)
Meconium-stained fluid54 (11.9)470 (12.8)200 (11.9)324 (13.3)524 (12.7)
Nuchal cord108 (23.9)847 (23.1)410 (24.4)545 (22.4)955 (23.2)
Oligohydramnios8 (1.8)35 (1.0)17 (1.0)26 (1.1)43 (1.0)
  • Data are presented as mean ± SD or n (%). LOS, length of stay.

  • a Includes Hispanic ethnicity, Asian, Pacific Islander, and Native American.

  • * P < .05.