Table 2. Incidence rate ratios of firearm to non-firearm post intervention.

Intervention	Level Rate Ratio1	95% CI3	Trend Rate Ratio2	95% CI3
Incidents
1980	0.30	0.79, 1.11	1.57	1.02, 2.41
1994	0.36	0.06, 2.25	1.03	0.95, 1.11
2001	2.48	0.24, 25.81	1.00	0.93, 1.07
Total Death Rate
1980	0.57	0.13, 2.59	1.26	0.94, 1.68
1994	0.64	0.17, 2.40	0.98	0.92, 1.04
2001	1.70	0.13, 21.72	0.99	0.92, 1.06
Male Death Rate
1980	0.67	0.20, 2.28	1.25	0.96, 1.62
1994	0.63	0.16, 2.50	0.98	0.92, 1.06
2001	9.40	0.64,138.77	0.95	0.89, 1.03
Female Death Rate
1980	0.44	0.05, 3.66	1.43	0.95, 2.15
1994	0.69	0.11, 4.30	0.97	0.89, 1.06
2001	0.27	0.04, 1.68	1.02	0.96, 1.09

¹ The rate ratio of the level or immediate impact of firearm mortality relative to non-firearm mortality after each year of legislation implementation which is the β₅ coefficient. A rate ratio greater than 1 suggests that the level of firearm mortality increased greater than the level in non-firearm mortality, while a ratio less than 1 suggests there is a decrease in the level of firearm compared to non-firearm mortality.

² The rate ratio of the trend of firearm mortality relative to non-firearm mortality after each year of legislation implementation which is the difference-in-differences regression results. A rate ratio greater than 1 suggests that the trend of firearm mortality increased greater than the trend in non-firearm mortality, while a ratio less than 1 suggests there is a decrease in the trend of firearm compared to non-firearm mortality.

³ CI–confidence interval.