Table 3. Risk ratio of transmission to secondary cases in low, middle, or high SES communities, given SES of the source case.
| Secondary Cases | |||||
|---|---|---|---|---|---|
| Low SES | Middle SES | High SES | Risk ratio | ||
| Source case | Low SES (17.2%) 1 | 5.45 (5.05–5.87) 2 | 1.79 (1.60–1.99) | 1.26 (1.10–1.43) | 2.16 (2.03, 2.31) |
| Middle SES (35.4%) | 0.65 (0.55–0.74) | 1.13 (1.04–1.21) | 0.91 (0.83–0.98) | 0.94 (0.88, 0.99) | |
| High SES (47.4%) | 0.31 (0.26–0.36) | 0.56 (0.52–0.61) | 0.78 (0.73–0.82) | 0.62 (0.59, 0.66) | |
1 The percentage of the study population is provided for each SES category.
2 95% confidence intervals are provided based on results from 1,000 stochastic simulations of the model.