Table 1. The proportions of all soldiers and soldiers who died by suicide who had psychiatric hospitalization and outpatient treatment for mental disorders in the prior 12 months among Regular Army soldiers over the years 2004-2009 (n = 975,057).

	% of all soldiers	(se)	% of all suicides	Count of suicides	Person-months1	Suicides/ 100,000 PY	(se)
I. Psychiatric hospitalization
With subsequent outpatient visits to …
Mental health specialist (MHS) only	0.11	(0.01)	0.5	3	42,010	85.7	(50.4)
General medical (GM) only	0.06	(0.01)	0.4	2	22,423	107.0	(77.5)
Both MHS and GM	0.65	(0.03)	11.1	63	242,178	312.2	(41.3)
Without subsequent outpatient visits	0.04	(0.01)	0.0	0	16,416	0.0	(0.0)
Total	0.9	(0.03)	12.0	68	323,427	252.3	(31.8)
II. Outpatient visits with mental disorder diagnoses without hospitalization
Mental health specialist (MHS) only	6.0	(0.1)	11.8	67	2,227,928	36.1	(4.4)
General medical (GM) only	13.4	(0.1)	12.7	72	4,952,222	17.4	(2.1)
Both MHS and GM	5.1	(0.1)	17.8	101	1,897,210	63.9	(6.4)
Total	24.5	(0.1)	42.2	240	9,077,360	31.7	(2.1)
III. All other soldiers
Total	74.6	(0.1)	45.9	261	27,606,798	11.3	(0.7)
IV. All Regular Army soldiers
Total	100.0	--	100.0	569	37,007,585	18.5	(0.8)

Abbreviations: SE, standard error; PY, person-years.

¹We report number of person-months rather than numbers of soldiers because soldiers differ in how long they remain in service and analysis at the level of the person-month is more accurate at the level of the person.