. Author manuscript; available in PMC: 2019 Jan 1.

Published in final edited form as: Mil Behav Health. 2017 Jul 18;6(1):75–81. doi: 10.1080/21635781.2017.1343163

Table 2.

Variation in order of heroin and prescription opioid (PO) initiation across heroin cohorts.

Heroin cohort	Subsample size	% initiating POs and heroin in specified order

		POs then heroin	Heroin then POs	Same year
Born <1970, premilitary heroin initiation	10	40	20	40
Born <1980, in military heroin initiation	15	33	40	27
Born 1970–84, postmilitary heroin initiation	17	65	6	29
Born 1985+, premilitary heroin initiation	7	57	14	29
Overall	49	49^**	20^**	31

^**

Difference in order of initiation was significant at the α = .01 level.