Table 2.

Multivariate Analyses of Risk Factors for Hospitalization With GE, Winter GE, and Confirmed Rotavirus GE in the First Year of Life

Risk FactorAll Cases (N = 1606)Winter Cases Only (Jan–Mar, N = 625)*Rotavirus-confirmed Cases Only (N = 194)
OR95% CIOR95% CIOR95% CI
Infant characteristics
Birth weight (g)
 <15002.57(1.60,4.14)2.43(1.22,4.84)1.35(0.31,5.84)
 1500–24991.63(1.29,2.06)1.43(1.00,2.05)2.01(1.18,3.45)
 2500–40001.00(Reference)1.00(Reference)1.00(Reference)
 >40000.76(0.61,0.85)0.83(0.63,1.08)0.70(0.43,1.15)
Season of birth
 January–September1.00(Reference)1.00(Reference)1.00(Reference)
 October–December0.80(0.69,0.92)0.82(0.66,1.01)0.51(0.33,0.79)
Male gender1.42(1.27,1.60)1.56(1.31,1.86)1.38(1.02,1.87)
Maternal characteristics
Maternal age (y)
 <201.23(1.04,1.46)1.34(1.04,1.73)1.14(0.72,1.81)
 20–341.00(Reference)1.00(Reference)1.00(Reference)
 ≥350.69(0.55,0.87)0.61(0.42,0.88)0.92(0.54,1.55)
Maternal race
 Asian0.49(0.34,0.70)0.63(0.38,1.03)0.49(0.20,1.21)
 All other races1.00(Reference)1.00(Reference)1.00(Reference)
Maternal smoking1.21(1.06,1.39)1.44(1.18,1.75)1.16(0.79,1.69)
Unmarried mother1.24(1.08,1.44)1.07(0.86,1.34)0.95(0.64,1.39)
Insurance
 Medicaid1.44(1.26,1.65)1.31(1.07,1.61)1.46(1.03,2.07)
 All other1.00(Reference)1.00(Reference)1.00(Reference)
  • * All 8084 control subjects used.

  • 3308 Controls, 1992 or later birth.