Table 6.
Predictors of risk of household transmission by attributes of the index case and household.
| Household transmission | |||||
|---|---|---|---|---|---|
| No | Yes | OR | 95% CI | p-value | |
| Agea Mean (SD) | 39.2 (18.8) | 49.4 (17.6) | 1.36 | 1.13–1.65 | 0.0013 |
| NT titerb GMT (SF) | 50.7 (2.0) | 105.3 (1.8) | 4.81 | 1.85–12.46 | 0.0012 |
| Persons in the HH Mean (SD) | 3.2 (1.3) | 3.7 (1.6) | 0.94 | 0.76–1.17 | 0.5850 |
| Children in the household | 21 (33.9) | 18 (54.5) | 1.65 | 0.85–3.22 | 0.1419 |
| Sex, female | 31 (49.2) | 17 (51.5) | 0.80 | 0.42–1.54 | 0.5086 |
| Isolation | 13 (20.6) | 2 (6.1) | 0.26 | 0.07–0.89 | 0.0322 |
CI confidence interval, GMT geometric mean titer, NT neutralization test, SF Scatter factor, SD standard deviation.
aOdds ratio (OR) by 10 years increase.
bOR by tenfold increase.