To enable the intervention study, the sample was restricted to patients with insurance that covered the mental health specialists fielding the interventions. In 4 organizations, virtually all patients were eligible. In one site, the study was limited to patients with prepaid plans, while in another it was restricted to those with prepaid plans and about 50% of those with fee-for-service plans. Across sites, staff approached 44,052 individuals, of whom 10,120 (23.0%) were ineligible, ie, younger than 18 years, ineligible insurance, or there for laboratory studies only or accompanying a patient. Of 33,932 eligible patients, 6600 (19.5%) refused the survey, and 27,332 agreed. This article excludes surveys completed in Spanish (n=1754), because the items assessing utility were worded differently. The items used to measure utility were at the end of the survey, and 7211 English-speaking respondents (29.8%) did not complete them because they had to leave the clinic, so we excluded them, as well as an additional 809 patients (3.3%) who were missing data on age or depression. The analytic sample consisted of 17,558 patients. Persons who completed the items were younger and in better perceived general health (P<.001), more likely to be depressed (P<.02), and disproportionately from 2 sites. These factors explained only 5% of variance in response, however. We controlled for these factors in analyses and weighted the data for probability of participation and response.