Patient characteristics*
| Pre-exposure period | Exposure period | |||
|---|---|---|---|---|
| Control sites (n=6033) (%) | Exposure sites (n=2476) (%) | Control sites (n=36 765) (%) | Exposure sites (n=9638) (%) | |
| Gender | ||||
| Male | 93.1 | 90.8 | 93.5 | 94.9 |
| Female | 6.9 | 9.2 | 6.5 | 5.1 |
| Race | ||||
| Non-Hispanic white | 65.3 | 52.2 | 54.4 | 64.8 |
| African-American | 16.0 | 26.7 | 22.3 | 11.9 |
| Missing or unknown or other | 18.7 | 21.1 | 23.3 | 23.3 |
| Marital status | ||||
| Married | 56.9 | 54.6 | 48.4 | 60.7 |
| Divorced/separated | 23.8 | 22.4 | 28.4 | 24.0 |
| Other | 19.3 | 23.0 | 23.1 | 15.3 |
| Age (years) | ||||
| <45 | 11.0 | 15.3 | 8.8 | 4.3 |
| 45–64 | 55.2 | 57.0 | 53.7 | 57.4 |
| 65–74 | 16.0 | 13.0 | 18.7 | 23.1 |
| 75 and older | 17.7 | 14.6 | 18.8 | 15.2 |
Numbers may not add due to rounding.
*All of the differences between the exposure and control sites in the exposure period were statistically significant (p<0.05).