Table 1.

Adjusted Association between County Elevation and Suicide Rate (per 100,000) in 2584 United States Counties^a

		Overall suicide rate		Firearm suicide rate		Nonfirearm suicide rate
County elevation (ft)	n	β	95% CI	β	95% CI	β	95% CI
<1000	1743	Reference	—	Reference	—	Reference	—
1000–1999	722	0.17	−0.17, 0.50	−0.15	−0.47, 0.16	0.36	0.19, 0.53
2000–2999	230	3.25	2.64, 3.86	2.05	1.47, 2.62	1.01	0.69, 1.32
3000–3999	116	3.38	2.56, 4.20	2.42	1.67, 3.17	1.18	0.76, 1.59
4000–4999	98	6.23	5.45, 7.02	4.76	4.03, 5.49	1.94	1.53, 2.34
5000–5999	55	9.60	8.56, 10.63	6.26	5.30, 7.22	2.92	2.39, 3.45
6000–6999	41	7.95	6.77, 9.13	5.91	4.83, 7.00	1.85	1.26, 2.45
7000–7999	28	8.47	7.01, 9.91	6.11	4.79, 7.43	2.29	1.57, 3.01
8000–8999	16	7.40	5.40, 9.40	6.00	4.17, 7.80	0.60	−0.39, 1.60
≥9000	18	9.12	7.20, 11.050	6.69	4.78, 8.61	2.57	1.52, 3.62

CI, confidence interval.

^aControlling for percent of age >50 yr, percent male, percent white, median household income, median family income, and population density of each county.