Am J Psychiatry 155:1415-1422, October 1998
©Copyright 1998 American Psychiatric Association
Psychiatric Disorder Onset and First Treatment Contact in the United States and Ontario
Mark Olfson, M.D., M.P.H.,
Ronald C. Kessler, Ph.D.,
Patricia A. Berglund, M.B.A., and
Elizabeth Lin, Ph.D.
Objective:The authors describe the timing of the first treatment contact following new-onset DSM-III-R mood, anxiety, and addictive disorders in community samples from the United States and Ontario, Canada, before and after passage of the Ontario Health Insurance Plan.Method:The authors drew data from the National Comorbidity Survey (NCS) (N=8,098) and the mental health supplement to the Ontario Health Survey (OHS) (N=9,953). They assessed psychiatric disorders with a modified version of the Composite International Diagnostic Interview; they also assessed retrospectively age at disorder onset and first treatment contact. They used the Kaplan-Meier method to generate time-to-treatment curves and survival analysis to compare time-to-treatment intervals across the two surveys.Results:The overall time-to-treatment curves revealed substantial differences between disorders that were consistent across the two surveys. In both surveys, panic disorder had the highest probability of first-year treatment (NCS, 65.6%; OHS supplement, 52.6%), while phobia (NCS, 12.0%; OHS supplement: 6.5%) and addictive disorders (NCS, 6.4%; OHS supplement, 4.2%) had the lowest in both surveys. Retrospective subgroup analysis suggests that before the passage of the Ontario public insurance plan, the likelihood of receiving treatment in the year of disorder onset was greater in Ontario than in the United States but that this relationship reversed following passage of the Ontario plan. During this period, the authors observed no significant between-country differences in the probability of prompt treatment of adults with 12 or fewer years of education. Conclusions:These results challenge the assumption that the universal health insurance plan in Ontario promotes greater access to mental health services than is available in the United States for vulnerable groups. Marked differences between disorders in the speed to first treatment suggest that in both countries, clinical factors play an important role in the timing of the initial decision to seek treatment. Am J Psychiatry 1998; 155: 1415-1422
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