Comparison of case rates for programme and non-programme populations, including unadjusted and adjusted rates, rate differences and rate ratios
| Rate* in programme houses | Rate* in non-programme houses | Rate difference | Rate ratio | Preventive fraction | |
|---|---|---|---|---|---|
| Unadjusted (95% CI) | 3.1 (0.8 to 8.0) | 9.6 (6.8 to 13.3) | 6.5 (2.2 to 10.8) | 0.32 (0.10 to 0.84) | 68% (9.2 to 88.4%) |
| Adjusted† (95% CI) | 3.5 (0 to 8.2) | 9.5 (7.3 to 11.7) | 6.0 (0.8 to 11.1) | 0.37 (0.00 to 0.86) | 63% (16 to 100%) |
*Per 100 000 person-years.
†Multivariate regression analysis using independent samples approach, controlling for size of the populations and the follow-up duration and the percentages of rental versus owned houses, head of household (HH) being African–American or Hispanic, HH being elderly (>64 years), as well as elderly HH and rented or elderly HH and owned houses (see text).