Multiple regression of salmonellosis rate with different SES factors
| Explanatory variable | Estimate | SE | IRR | 95% CI | P value* |
| Low access to store—non-Hispanic Asian seniors (%) | 0.6839 | 0.2313 | 1.98 | 1.26 to 3.11 | 0.003 |
| Social association (per 10 000) | −0.1122 | 0.0151 | 0.89 | 0.87 to 0.92 | <0.001 |
| Severe housing problem (%) | 0.091 | 0.0216 | 1.1 | 1.05 to 1.14 | <0.001 |
| College education (%) | 0.052 | 0.0081 | 1.05 | 1.04 to 1.07 | <0.001 |
| Zero-inflation model | |||||
| Severe housing problem (%) | −0.6661 | 0.3114 | OR=0.51 | 0.28 to 0.95 | 0.03 |
IRR, incidence rate ratio; SES, socioeconomic status.