Table 1. Overall sample characteristics (N = 592).).

Variable		Median or frequency %
Age, yr		45 (Range: 18–76)
Age at onset-of-use, yr		16 (Range: 8-65)
Population group	Jewish	84.1%
	Arab	15.9%
Sex	Female	8.6%
	Male	91.4%
Treatment center	Opioid Maintenance	44.1%
	In-Patient	32.4%
	Dual diagnosis	23.5%