Results for reduced multivariate regression models for traced handguns linked to violent and firearm related crimes, and for all traced handguns*
| Variable | Handguns linked to violent and firearm related crimes | All traced handguns | ||||||
|---|---|---|---|---|---|---|---|---|
| RR | 95% CI | p Value | RR | 95% CI | p Value | |||
| *Gun years of exposure/1000 is employed as an offset variable; results are on a per 1000 gun year basis. Time to crime was not incorporated in these models. | ||||||||
| †Measured at the county level. | ||||||||
| RR, rate ratio; CI, confidence interval. | ||||||||
| Variables measured at the retailer level | ||||||||
| Gun years from police sales, % | 0.99 | 0.99–1.00 | 0.04 | 0.99 | 0.99–1.00 | 0.007 | ||
| Gun years from sales of multiple guns, % | 1.01 | 1.00–1.02 | 0.07 | |||||
| Denials, % (of sales + denials) | 1.43 | 1.32–1.56 | <0.0001 | 1.37 | 1.28–1.47 | <0.0001 | ||
| Median age of purchasers, y | 0.95 | 0.94–0.97 | <0.0001 | 0.95 | 0.94–0.96 | <0.0001 | ||
| Retailer type (pawnbroker = 1, gun dealer = 0) | 1.26 | 1.02–1.55 | 0.03 | 1.30 | 1.10–1.53 | 0.002 | ||
| Variables reflecting local gun commerce and tracing policy | ||||||||
| Federal Firearm Licensees per 100 000 people† | 0.97 | 0.96–0.98 | <0.0001 | 0.97 | 0.96–0.98 | <0.0001 | ||
| Retailer’s city traces all recovered guns (yes = 1) | 1.43 | 1.15–1.78 | 0.001 | 1.52 | 1.28–1.79 | <0.0001 | ||
| Crime rates per 100 000 people† | ||||||||
| Robbery | 1.00 | 1.00–1.00 | 0.003 | 1.00 | 1.00–1.00 | <0.0001 | ||
| Sociodemographics† | ||||||||
| Latino population, % | 1.01 | 1.00–1.02 | 0.07 | |||||