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. 2017 Oct 6;66(18):1–16. doi: 10.15585/mmwr.ss6618a1

FIGURE 1.

Line graph indicates age-adjusted suicide rates per 100,000 population among persons aged ≥10 years by county urbanization level in the United States during 2001 to 2015. Lines represent the United States as well as nonmetropolitan/rural, medium/small metropolitan, and large metropolitan urbanization levels. Joinpoint regression analysis was used to determine annual percentage change with statistically significant trend (p<0.05). Dots indicate the joinpoints.

Suicide rates* among persons aged ≥10 years, by county urbanization level† — United States, 2001–2015§

* Per 100,000 residents aged ≥10 years, age adjusted to the 2000 U.S. standard population.

† Levels of urbanization were collapsed using the 2006 National Center for Health Statistics urban classification scheme. The six classification levels for counties are 1) large central metropolitan (part of a metropolitan statistical area with ≥1 million population and includes a principal city); 2) large fringe metropolitan (part of a metropolitan statistical area with ≥1 million population but does not include a principal city); 3) medium metropolitan (part of a metropolitan statistical area with ≥250,000 but <1 million population); 4) small metropolitan (part of a metropolitan statistical area with <250,000 population); 5) micropolitan (nonmetropolitan) (part of a micropolitan statistical area [has an urban cluster of ≥10,000 but <50,000 population]); and 6) noncore (nonmetropolitan) (not part of a metropolitan or micropolitan statistical area). Large metropolitan includes counties from large central metropolitan and large fringe metropolitan areas. Medium/small metropolitan includes counties from medium metropolitan and small metropolitan areas. Nonmetropolitan includes counties from micropolitan and noncore areas.

§ Joinpoint regression analysis was used to determine annual percentage change with statistically significant trend (p<0.05). Dots indicate the joinpoints.