Table 3.

Prevalence of Comorbid Posttraumatic Stress Disorder and Depressive Disorders Among Active-Duty Service Members^a,^b

Service Branch	Measure	2010	2011	2012	2013	2014	2015
All services	Casesc	13,426	14,871	16,065	15,205	14,936	11,274
	Population	1,701,358	1,680,997	1,621,472	1,586,951	1,543,929	1,482,076
	Period Prevalenced	0.79%	0.88%	0.99%	0.96%	0.97%	0.76%
Army	Casesc	9,651	10,669	11,421	10,642	10,036	7,402
	Population	746,097	739,972	696,604	670,076	634,747	595,259
	Period Prevalenced	1.29%	1.44%	1.64%	1.59%	1.58%	1.24%
Air Force	Casesc	938	1,040	1,154	1,280	1,520	1,148
	Population	385,118	376,737	376,494	372,915	368,333	350,368
	Period Prevalenced	0.24%	0.28%	0.31%	0.34%	0.41%	0.33%
Marine Corps	Casesc	1,627	1,765	1,998	1,860	1,770	1,384
	Population	216,088	213,691	207,408	203,047	198,482	191,867
	Period Prevalenced	0.75%	0.83%	0.96%	0.92%	0.89%	0.72%
Navy	Casesc	1,210	1,397	1,492	1,423	1,610	1,340
	Population	354,055	350,597	340,966	340,913	342,367	344,582
	Period Prevalenced	0.34%	0.4%	0.44%	0.42%	0.47%	0.39%

^aComorbidity defined as meeting case criteria for both PTSD and depression spectrum disorders within a single calendar year.

^bData pulled from the Military Health Syatem Data Repository August 20, 2016, for active-duty service members (including activated Guard or Reserve). Data from the Direct Care system only.

^cA case is defined as at least 2 outpatient visits or 1 inpatient visit with target diagnostic code(s) in the first or second position. Case criteria must be met within the calendar year for inclusion in the data set.

^dAnnual period prevalence equals the total number of identified cases divided by active duty strength at the middle of the calendar year.