| State | 12+ (2005-2006) |
12+ (2006-2007) |
12+ (p value) |
12-17 (2005-2006) |
12-17 (2006-2007) |
12-17 (p value) |
18-25 (2005-2006) |
18-25 (2006-2007) |
18-25 (p value) |
26+ (2005-2006) |
26+ (2006-2007) |
26+ (p value) |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| NOTE: p value: Bayes posterior probability of no change. NOTE: Estimates are based on a survey-weighted hierarchical Bayes estimation approach. a Difference between the 2006-2007 estimate and the 2005-2006 estimate is statistically significant at the 0.05 level. b Difference between the 2006-2007 estimate and the 2005-2006 estimate is statistically significant at the 0.10 level. Source: SAMHSA, Office of Applied Studies, National Survey on Drug Use and Health, 2005, 2006, and 2007. |
||||||||||||
| Total U.S. | 5.00 | 5.09 | 0.363 | 7.01 | 6.91 | 0.526 | 12.42 | 12.28 | 0.493 | 3.43 | 3.59 | 0.159 |
| Northeast | 4.46 | 4.27 | 0.169 | 6.08b | 5.58 | 0.064 | 11.64 | 11.21 | 0.210 | 3.07 | 2.95 | 0.452 |
| Midwest | 4.98 | 5.08 | 0.385 | 6.99 | 6.95 | 0.836 | 12.70 | 12.75 | 0.861 | 3.33 | 3.48 | 0.281 |
| South | 5.08 | 5.18 | 0.404 | 7.37 | 7.31 | 0.780 | 12.71 | 12.22 | 0.101 | 3.45b | 3.70 | 0.099 |
| West | 5.34 | 5.60 | 0.145 | 7.19 | 7.26 | 0.842 | 12.30 | 12.74 | 0.313 | 3.80 | 4.06 | 0.233 |
| Illinois | 4.39 | 4.28 | 0.575 | 5.97 | 5.81 | 0.700 | 10.34 | 10.34 | 0.996 | 3.11 | 2.98 | 0.605 |
| Indiana | 5.91 | 6.22 | 0.415 | 7.86 | 7.74 | 0.882 | 15.96 | 15.48 | 0.657 | 3.83 | 4.39 | 0.240 |
| Iowa | 4.43a | 3.88 | 0.050 | 6.78 | 5.74 | 0.146 | 11.52 | 10.19 | 0.115 | 2.82 | 2.49 | 0.316 |
| Kansas | 5.25 | 4.86 | 0.284 | 7.00 | 7.47 | 0.505 | 12.66 | 11.44 | 0.227 | 3.59 | 3.25 | 0.445 |
| Kentucky | 5.59 | 6.23 | 0.110 | 8.83 | 8.30 | 0.518 | 14.68 | 16.33 | 0.193 | 3.70 | 4.39 | 0.157 |
| Louisiana | 5.69 | 6.19 | 0.220 | 8.72 | 8.33 | 0.611 | 13.06 | 13.19 | 0.900 | 3.79 | 4.53 | 0.150 |
| Maine | 4.66 | 4.56 | 0.782 | 7.28 | 6.41 | 0.242 | 13.50 | 13.76 | 0.806 | 3.03 | 3.04 | 0.973 |
| Maryland | 3.96 | 4.28 | 0.244 | 6.11 | 5.75 | 0.580 | 10.18 | 10.91 | 0.406 | 2.64 | 2.99 | 0.318 |
| Massachusetts | 5.56 | 5.65 | 0.807 | 6.40 | 6.28 | 0.876 | 15.72 | 15.32 | 0.738 | 3.77 | 3.93 | 0.739 |
| Michigan | 5.59 | 5.66 | 0.777 | 7.86 | 7.62 | 0.629 | 14.23 | 13.57 | 0.309 | 3.77 | 4.03 | 0.366 |
| Minnesota | 4.39 | 4.35 | 0.910 | 6.31 | 5.79 | 0.459 | 11.28 | 11.41 | 0.899 | 2.88 | 2.90 | 0.944 |
| Ohio | 5.08a | 5.57 | 0.025 | 7.26 | 7.59 | 0.477 | 13.79a | 15.40 | 0.013 | 3.30 | 3.65 | 0.181 |