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Table 1  Demographic Characteristics of the cohort

From: Do maternal demographics and prenatal history impact the efficacy of betamethasone therapy for threatened preterm labor?

Variable Overall Cohort
n = 209a
Neonates with RDSb
n = 90
Neonates without RDS
n = 114
p-valuec
Maternal Age 27.5 (5.9) 28.7 (6.4) 26.5 (5.1) 0.010
Maternal BMId at Dosing 32.4 (7.8) 32.0 (6.8) 32.7 (8.4) 0.488
Maternal Ethnicity
 Hispanic 37 (17.8%) 15 (16.7%) 22 (19.3%) 0.630
 Non-Hispanic 171 (82.2%) 75 (83.3%) 92 (80.7%)
Maternal Race
 Black or African American 90 (43.3%) 39 (43.3%) 48 (42.1%) 0.740
 White or Caucasian 108 (51.9%) 48 (53.3%) 59 (51.8%)
 More than one Race/Other 8 (3.85%) 2 (2.2%) 6 (5.3%)
 Unknown/Not Reported 2 (0.96%) 1 (1.1%) 1 (0.9%)
Maternal Alcohol Use 5 (2.4%) 3 (3.3%) 1 (0.9%) 0.209
Maternal Tobacco Use 56 (26.9%) 27 (30.0%) 28 (24.6%) 0.385
Maternal Illicit Drug Use 47 (22.6%) 21 (23.3%) 24 (21.0%) 0.696
Diabetes 28 (13.6%) 11 (12.2%) 16 (14.0%) 0.162
Preeclampsia 52 (25.2%) 31 (34.4%) 21 (18.4%) 0.007
Chronic Hypertension 44 (21.2%) 23 (25.6%) 21 (18.4%) 0.219
Premature Labor 72 (35.0%) 28 (31.1%) 43 (37.7%) 0.281
PPROMe 24 (11.5%) 14 (15.6%) 9 (7.9%) 0.086
GAf at BMZg Dosing 30.8 (2.6) 30.0 (2.8) 31.5 (2.3) <0.001
Days Between Last BMZ Dose and Delivery 25.6 (23.6) 10.9 (12.7) 37.0 (24.1) <0.001
Total Doses of BMZ 2.3 (0.7) 2.4 (0.9) 2.2 (0.5) <0.034
GA at Delivery 34.6 (3.6) 31.7 (2.7) 36.9 (2.2) <0.001
Type of Delivery
 Vaginal 115 (55.3%) 33 (36.7%) 81 (71.1%) <0.001
 Cesarean Section 93 (44.7%) 57 (63.3%) 33 (28.9%)
Male Fetal Sex 94 (45.4%) 40 (44.4%) 53 (46.5%) 0.771
  1. aFive neonates did not have RDS outcomes recorded: two stillborn and three live births without traceable RDS outcome
  2. bRespiratory distress syndrome (RDS)
  3. cP-values are from univariable chi-squared analysis or Student’s t-test, comparing results between the group who developed RDS and the group that did not
  4. dBody mass index (BMI) reported in kg/m2
  5. ePreterm premature rupture of membranes (PPROM)
  6. fGestational age (GA)
  7. gBetamethasone (BMZ)