An ICD-9 code of 295.xx was used to flag schizophrenia.
Outpatient diagnoses were observed on different days.
We used MAX data from the following states in 2007: Alabama, Alaska, California, Connecticut, Georgia, Idaho, Illinois, Indiana, Iowa, Louisiana, Maryland, Missouri, Mississippi, New Hampshire, North Carolina, North Dakota, Nevada, Oklahoma, South Dakota, Washington DC, West Virginia, and Wyoming. These states were noted to have complete enrollment, fee-for-service (FFS) claims and encounter records. Although the sample was primarily enrolled in FFS plans, some states with complete encounter data were included in our analytic sample.
2008 data were available for a subset (N=16) of the 2007 states: Alabama, Alaska, Connecticut, Georgia, Idaho, Indiana, Iowa, Louisiana, Maryland, Mississippi, New Hampshire, North Carolina, Oklahoma, South Dakota, West Virginia, and Wyoming.
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