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Table 15.1. Twelve-month prevalence and severity of DSM-IV disorders in the NCS-R
(n = 9282)1
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Severity2
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Total
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Serious
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Moderate
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Mild
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%
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(se)
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%
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(se)
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%
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(se)
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%
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(se)
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I. Anxiety Disorders
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Panic disorder
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2.7
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(0.2)
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45.1
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(3.3)
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27.5
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(2.7)
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27.4
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(2.9)
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Agoraphobia without panic
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0.8
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(0.1)
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37.3
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(7.4)
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33.3
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(6.5)
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29.5
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(8.8)
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Specific phobia
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8.7
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(0.4)
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21.5
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(1.9)
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29.6
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(1.9)
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48.8
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(2.0)
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Social phobia
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6.8
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(0.3)
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29.9
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(2.0)
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38.4
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(2.5)
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31.6
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(2.5)
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Generalized anxiety disorder
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2.7
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(0.2)
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29
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(3.2)
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46
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(4.1)
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25
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(3.1)
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Post-traumatic stress disorder3
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3.6
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(0.3)
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36.6
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(3.4)
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32.6
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(2.2)
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30.3
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(3.4)
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Obsessive-compulsive disorder4
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1.1
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(0.3)
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41.6
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(11.6)
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26.1
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(12.3)
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32.4
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(13.6)
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Separation anxiety disorder5
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0.9
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(0.2)
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43.3
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(9.2)
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24.8
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(7.5)
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31.9
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(12.2)
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Any anxiety disorder6
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18.2
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(0.7)
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22.5
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(1.5)
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33
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(1.3)
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44.4
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(2.0)
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II. Mood Disorders
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Major depressive disorder
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6.7
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(0.3)
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30.1
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(1.7)
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50.2
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(2.2)
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19.7
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(2.1)
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Dysthymia
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1.5
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(0.1)
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49.7
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(3.9)
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32.1
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(4 .0)
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18.2
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(3.4)
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Bipolar I-II disorders
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2.6
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(0.2)
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82.9
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(3.2)
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17.1
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(3.2)
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0
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0
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Any mood disorder
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9.5
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(0.4)
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44.8
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(1.9)
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40.2
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(1.7)
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15.1
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(1.6)
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III. Impulse-control Disorders
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Oppositional-defiant disorder5
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1
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(0.2)
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49.6
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(8.0)
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40.3
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(8.7)
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10.1
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(4.8)
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Conduct disorder5
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1
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(0.2)
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40.5
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(11.1)
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25
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(7.2)
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34.5
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(9.5)
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Attention-deficit/hyperactivity disorder5
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4.1
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(0.3)
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41.3
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(4.3)
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35.2
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(3.5)
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23.5
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(4.5)
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Intermittent explosive disorder
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2.6
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(0.2)
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23.6
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(3.1)
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74.6
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(3.2)
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1.8
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(0.9)
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Any impulse‑control disorder5,7
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8.9
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(0.5)
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33
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(2.8)
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51.5
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(3.2)
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15.5
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(2.5)
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IV. Substance Disorders
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Alcohol abuse3
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3.1
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(0.3)
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26.3
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(2.8)
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26.6
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(3.2)
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10.4
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(2.7)
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Alcohol dependence3
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1.3
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(0.2 )
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28.3
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(4.8)
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37
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(5.4)
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13.9
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(3.6)
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Drug abuse3
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1.4
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(0.2)
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36.4
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(4.9)
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20.1
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(4.2)
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10.8
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(3.1)
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Drug dependence3
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0.4
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(0.1)
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57.3
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(8.0)
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22.8
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(7.0)
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7.5
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(4.0)
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Any substance disorder3
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3.8
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(0.4)
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27.3
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(3.0)
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26.1
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(2.8)
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9.9
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(2.2)
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V. Any Disorder
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Any6
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26.2
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(0.9)
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22
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(1.3)
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35.5
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(1.2)
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37
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(1.4)
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One disorder6
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14.4
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(0.7)
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9.7
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(1.3)
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31.1
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(1.9)
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52.4
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(2.1)
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Two disorders6
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5.9
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(0.3)
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25.6
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(1.9)
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42
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(2.2)
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26
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(2.1)
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Three or more disorders6
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5.9
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(0.3)
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48.9
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(2.4)
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39.9
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(2.3)
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10.1
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(1.5)
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1Reproduced, in part, from table 2 in Kessler et al.
(in press-b). The definition of severity used here differs from the one used in
that earlier report in that we focus here only on severity of mental disorders,
while that report also included severity of substance use disorders in the definition.
2The severity measure is used to classify the severity of mental disorders,
not substance use disorders. As a result, the percentages in the three severity
columns sum to 100 percent across each row for the mental disorders, but not the
substance use disorders. In the case of the substance use disorders, the sum represents
the distribution of comorbid mental disorders among people with substance use
disorders.
3Assessed only in the Part II NCS-R sample (n = 5,692).
4Assessed only in a random one-third subsample of the Part II NCS-R sample
(n = 2,073).
5Assessed only in the Part II NCS-R sample among respondents in the age
range 18–44 (n = 3,197).
6Estimated only in the Part II NCS-R sample. No adjustment is made for the
fact that one or more disorders in the category were not assessed for all Part
II respondents.
7The estimated prevalence of any impulse-control disorder is larger than
the sum of the individual disorders because the prevalence of intermittent explosive
disorder, the only impulse-control disorder that was assessed in the total sample,
is reported here for the total sample rather than for the subsample of respondents
among whom the other impulse-control disorders were assessed (Part II respondents
in the age range 18–44). The prevalence of any impulse-control disorder,
in comparison, is estimated in the latter subsample. Intermittent explosive disorder
has a considerably higher estimated prevalence in this subsample than in the total
sample.
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