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Table 1 Demographic and clinical characteristics of the study population

From: Association between ß2-adrenergic receptor gene polymorphisms and adverse events of ritodrine in the treatment of preterm labor: a prospective observational study

Characteristics Total (n = 186) Adverse Event Group (n = 33) No Adverse Event Group (n = 153) P-value
Age, years 30.88 ± 4.70 31.21 ± 3.45 30.81 ± 4.48 .635
Body mass index, kg/m2 24.50 ± 3.19 24.97 ± 2.98 24.40 ± 3.23 .354
Gestational age at start of therapy, weeks 29.60 ± 3.91 28.97 ± 4.23 29.74 ± 3.85 .308
Maximum infusion rate, mg/min 0.083 ± 0.030 0.096 ± 0.044 0.080 ± 0.026 .006
Comorbid conditions, N (%)
 Twin or multiple gestation 16 (8.6) 4 (12.1) 12 (7.2) .491
 Diabetes mellitus 13 (7.0) 3 (9.1) 10 (6.5) .729
 Uterine infection 15 (8.1) 1 (3.0) 14 (9.2) .475
  1. Data are expressed as means ± SDs, unless otherwise specified