Volume 6, Number 6—December 2000
Research
Risk Factors for Otitis Media and Carriage of Multiple Strains of Haemophilus influenzae and Streptococcus pneumoniae
Jennifer St. Sauver*, Carl F. Marrs*, Betsy Foxman*, Patricia Somsel†, Robbie Madera*, and Janet R. Gilsdorf*
Table 4
Multivariate logistic regression odds ratios and 95% confidence intervalsa predicting carriage of two or more genetically distinct Haemophilus influenzae isolates during a sampling period.
| Risk Factor | Carriage of two or more H. influenzae genetic types (N=54) OR (95% CI) |
|---|---|
| Exposed to smoking | 3.89 (1.83-8.28) |
| Allergies | 2.48 (1.03-5.95) |
| Age | |
| 24-35 months | 0.60b (0.28-1.27) |
| 36-47 months | 3.43b (1.35-8.71) |
| 48+ months | 1.28b (0.49-3.32) |
| Antibiotic use | 0.26 (0.07-1.01) |
a Logistic regression performed with the generalized estimating equations (GEE) SAS macro to control for correlation between multiple samples taken from the same children. All risk factors were included in a single model.
b Odds ratios compared with 23-month age group.
