Table 2 Incident rate ratios^a and 95% confidence intervals of alcohol- and/or gun-involved suicides using Poisson regression associated with 10 percentage point increase in alcohol policy score or gun policy score category, compared to no alcohol or firearm involvement

  Unadjusted Poisson Model

1.15 (1.08, 1.22)*

1.64 (1.57, 1.71)*

1.46 (1.38, 1.55)*

1.44 (1.40, 1.48)*

  Adjusted Poisson Model I (state-level covariates)^b

1.22 (1.03, 1.44)*

1.48 (1.31, 1.68)*

1.39 (1.18, 1.63)*

1.32 (1.22, 1.44)*

  Adjusted Poisson Model II (addition of bac testing rate to model I)

1.11 (0.93, 1.32)

0.89 (0.77, 1.04)

1.00 (0.83, 1.21)

0.98 (0.89, 1.07)

  Adjusted Poisson Model III (addition of gun policy score to model II)

1.01 (0.81, 1.28)

0.68 (0.55, 0.84)*

0.48 (0.35, 0.66)*

0.72 (0.63, 0.83)*

  Unadjusted Poisson Model

0.97 (0.96, 0.99)*

0.77 (0.75, 0.78)*

0.83 (0.81, 0.84)*

0.85 (0.85, 0.86)*

  Adjusted Poisson Model I (state-level covariates)^b

0.98 (0.93, 1.04)

1.08 (1.01, 1.16)*

0.89 (0.83, 0.94)*

0.98 (0.95, 1.01)

  Adjusted Poisson Model II (addition of bac testing rate to model I)

0.95 (0.90, 1.01)

0.95 (0.90, 1.01)

0.86 (0.82, 0.91)*

0.93 (0.90. 0.96)*

  Adjusted Poisson Model III (addition of APS score to model II)

0.96 (0.89, 1.03)

0.86 (0.79, 0.93)*

0.74 (0.67, 0.81)*

0.86 (0.82, 0.90)*