Table 2.

Prevalence of Depression Spectrum Disorders Among Active-Duty Service Members^a

Service Branch	Measure	2010	2011	2012	2013	2014	2015
All listed services	Casesb	70,436	73,784	74,212	70,055	68,164	55,537
	Population	1,701,358	1,680,997	1,621,472	1,586,951	1,543,929	1,482,076
	Period Prevalencec	4.14%	4.39%	4.58%	4.41%	4.41%	3.75%
Army	Casesb	40,932	43,214	43,615	40,616	38,438	30,128
	Population	746,097	739,972	696,604	670,076	634,747	595,259
	Period Prevalencec	5.49%	5.84%	6.26%	6.06%	6.06%	5.06%
Air Force	Casesb	12,111	12,246	12,074	11,486	12,131	10,247
	Population	385,118	376,737	376,494	372,915	368,333	350,368
	Period Prevalencec	3.14%	3.25%	3.21%	3.08%	3.29%	2.92%
Marine Corps	Casesb	6,528	6,800	7,029	6,906	6,316	5,326
	Population	216,088	213,691	207,408	203,047	198,482	191,867
	Period Prevalencec	3.02%	3.18%	3.39%	3.4%	3.18%	2.78%
Navy	Casesb	10,865	11,524	11,494	11,047	11,279	9,836
	Population	354,055	350,597	340,966	340,913	342,367	344,582
	Period Prevalencec	3.07%	3.29%	3.37%	3.24%	3.29%	2.85%

^aData pulled from the Military Health System Data Repository (from the Direct Care system only) August 20, 2016, for active-duty service members (including activated Guard or Reserve); diagnostic codes included: 293.83, 296.2*, 296.3*, 296.82, 298.0, 300.4, 301.12, 309.0, 309.1, 309.28, 309.4, 311 (2010 – September 30, 2015); and F32, F320, F321, F322, F323, F324, F325, F328, F329, F33, F330, F331, F332, F333, F334, F3340, F3341, F3342, F338, F339,F34, F341, F348, F349, F39 (October 1, 2015 – December 31, 2015).

^bA 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.

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