Table 2.

Lifetime prevalence and age-of-onset of DSM-IV disorders in Ohio Army National Guard study participants, 2008–2012 (N=671).

Mental disorders	Prevalence		Age-of-onseta
	No.	%	Median	IQRb
Anxiety disorders
Panic disorder	30	4.5	24.0	15.0
Agoraphobia, without panic disorder	20	3.0	19.5	14.0
Specific phobia	39	5.8	10.0	13.0
Social phobia	43	6.4	11.0	7.0
Posttraumatic stress disorder	42	6.3	20.0	11.0
Obsessive compulsive disorder	25	3.7	12.5	13.0
Other anxiety disorder	33	4.9	20.0	13.0
Any anxiety disorder	144	21.5	15.0	14.0
2+ Anxiety disorders	41	6.1	13.0	15.5
Mood disorders
Major depressive disorder	154	23.0	21.0	13.0
Bipolar I/ II	29	4.3	20.0	12.0
Other mood disorders	41	6.1	24.0	14.0
Any mood disorder	190	28.3	21.0	13.0
2+ Mood disorders	12	1.8	20.0	13.5
Substance use disorders
Alcohol use disorderc	293	43.7	20.0	4.0
Drug use disorder	91	13.6	16.0	4.0
Any	313	46.7	19.0	4.0
Both alcohol and drug abuse	71	10.6	16.5	2.5
Aggregate mental disorders
0	259	38.6	–	–
1	204	30.4	19.0	4.0
2	115	17.1	17.0	5.0
3+	93	13.9	15.0	8.0

Note: IQR=inter-quartile range.

^aRetrospectively reported age-of-onset.

^bInter-quartile range (IQR) is the range between then 25th and 75th percen-tiles on the age-of-onset distribution.

^cIncludes abuse and dependence.