. Author manuscript; available in PMC: 2018 Jul 1.

Published in final edited form as: Soc Psychiatry Psychiatr Epidemiol. 2017 May 26;52(7):877–886. doi: 10.1007/s00127-017-1398-5

Table 2.

The Degree of Familial Confounding (as assessed by the Confounding Index) in the Association between Mortality and Drug Abuse in Cohorts Born 1955–1990 and 1940–1980

Cohort Born 1955–1980		Cohort Born 1940–1980
	Confounding Index*		Confounding Index*
Age	Drug Abuse	Age	Drug Abuse
15–22	0.85	15–22	0.95
23–39	0.77	23–39	0.70
40–44	0.72	40–44	0.60
45–49	0.69	45–49	0.53
50–56	0.64	50–54	0.66
		55–59	0.59
		60–64	0.66
		65-	0.85