DRUGS AND ALCOHOL IN AMERICA

2010-2011 National Survey on Drug Use and Health National Maps of
Prevalence Estimates, by State

The 98 national maps presented here show 2010-2011 National Survey on Drug Use and Health (NSDUH) estimates for 25 substance use and mental health outcomes, by age group, for 50 States and the District of Columbia. The color of each State on the U.S. maps indicates how the State ranks relative to other States for each measure. States could fall into one of five groups according to their ranking by quintiles. Because there are 51 areas to be ranked for each measure, the middle quintile was assigned 11 areas and the remaining groups 10 each. In some cases, a "quintile" could have more or fewer States than desired because two (or more) States have the same estimate (to two decimal places). When such ties occurred at the "boundary" between two quintiles, all States with the same estimate were assigned to the lower quintile. Those States with the highest rates for a given measure are in red, with the exception of the perceptions of risk measures, for which the lowest perceptions of great risk are in red. Those States with the lowest estimates are in white, with the exception of the perceptions of risk measures, for which the highest perceptions of great risk are in white. The upper and lower limits of each quintile shown in the map legend collectively define a continuum and are not necessarily the actual values of a particular area. For example, in Figure 1a, the values on the boundary in the lowest quintile correspond to Utah (4.96 percent) and Wyoming (7.13 percent) and are displayed in the legend. In the next to lowest quintile, Texas (7.15 percent) and New Jersey (7.98 percent) are the States with the lowest and highest values; however, in the continuum of the legend, the lower limit was assigned a value of 7.14 percent because the upper limit of the quintile below it is 7.13 percent.SEE REPORT AND MAPS HERE