Table 5. Effect of the Utah Prepaid Mental Health Plan on Psychiatric Length of Stay: Difference Between Capitated and Non-Capitated Sites.
| Time Period | Estimated Effect | 95-Percent Confidence Interval (Lower/Upper) |
Significance |
|---|---|---|---|
| Middle Period Versus Pre-Capitation Period | 0.7639 | -2.0864/3.6142 | .597 |
| Late Period Versus Pre-Capitation Period | 3.9811 | -0.0091/7.9712 | .051 |
| Late Period Versus Middle Period | 3.2171 | 1.1579/5.2772 | .002 |
| Time Trend | -1.4707 | -2.3024/-0.6392 | .000 |
NOTE: Pre-capitation period is July 1, 1988–June 30, 1991; middle (partial capitation) period is July 1, 1991–December 31, 1993; and late (full capitation) period is January 1, 1994–December 31, 1994.
SOURCES: Stoner, T., Manning, W., Christianson, J., University of Minnesota; Gray, D., University of Utah; and Marriott, S., Research Consulting, 1996.