TABLE 2.

Proportions of Case-Patients and Control Subjects With Characteristics Examined, Along With the Results of Matched Bivariate Analysis

FactorCase-Patients (%) n = 204 Unless StatedControl Subjects (%) n = 338 Unless StatedOR (P Value) n = 542OR (P Value) Case-Patients <6 Months of Age n = 279OR (P Value) Case-Patients ≥6 Months of Age n = 263
High-risk infant32 (16)8 (2.4)6.25 (<.001)*3.88 (.005)*13.6 (.001)*
Ever breastfed128 (63)272/337 (81)0.34 (<.001)*0.47 (.010)*0.22 (<.001)*
Ever breastfed more than half of feedings103/195 (53)245/327 (75)0.30 (<.001)*0.38 (.001)*0.22 (<.001)*
Breastfed within 2 wk of age of admission58 (28)153 (45)0.36 (<.001)*0.39 (.001)*0.33 (.003)*
Breastfed within 8 wk of age of admission65 (32)171 (51)0.32 (<.001)*0.38 (.001)*0.24 (<.001)*
Ever fed prechewed food77/202 (38)150/332 (45)0.67 (.083)0.42 (.038)*0.86 (.606)
≥7 Others in household39/203 (19)35 (10)2.07 (.003)*1.60 (.122)3.43 (.005)*
≥2 Others aged <2 y in household17 (8)10 (3)3.02 (.011)*3.53 (.018)*2.12 (.334)
≥4 Others aged <12 y in household61/202 (30)65/335 (19)1.91 (.005)*2.30 (.013)*1.60 (.144)
Shares bed with ≥1 other153 (75)217/337 (64)1.74 (.007)*1.78 (.041)*1.69 (.080)
≥2 Persons/room in household103/202 (51)133 (39)1.71 (.005)*2.46 (.001)*1.18 (.534)
Smoker in household138/202 (68)198/338 (59)1.61 (.018)*1.48 (.146)1.79 (.055)
Mother’s education >grade 1222/199 (11)65/337 (19)0.49 (.011)*0.40 (.030)*0.58 (.155)
  • * P < .05.

  • Nonsignificant factors included: male sex, mother living with infant, father living with infant, ≥5 rooms in house, shares bedroom with 4 others, primary fuel (wood, oil, propane, kerosene, other), primary cooking fuel (wood, propane, kerosene, electric, other), electricity in home, household owns boat, household owns snow machine, household owns vehicle, running water in home, flush toilet in home, father’s education >grade 12, mother works outside home, father works outside home, attends daycare, uses some public assistance (food stamps, welfare, Special Supplemental Nutrition Program for Women, Infants, and Children, Medicaid, or Social Security).

  • High-risk infants are those children who were born with gestational age ≤36 weeks’, or with chronic lung disease, heart disease, or other systemic medical condition that impairs respiratory function.