Table 2.

.Description of quality indicators for the 339,966 study veterans

Measure	Description	Denominator	No. of eligible patients	Rate
Treatment initiation	Treatment initiation within 14 days of the start of an index treatment episode	Veterans with an index episode in the inpatient or outpatient setting, following a 5 month period of no SUD treatment	253,512	17.4%
Treatment engagement	Two or more diagnosis-related encounters in the outpatient setting within the 30 days of the start of an index episode	Among those who initiated, veterans with an index episode in an inpatient or outpatient setting, following a 5-month period of no SUD treatment	44,129	58.6%
Psychosocial treatment	Psychosocial treatment or psychotherapy for an SUD diagnosis	All study veterans alive at the end of the observation period	336,196	48.3%
Psychotherapy	Psychotherapy treatment in outpatient setting for an SUD diagnosis	All study veterans alive at the end of the observation period	336,196	26.5%

Notes: No. = number; SUD = substance use disorder.