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H SMALL AREA ANALYSIS
REGRESSION POINT DISPLACEMENT DESIGN
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0001 Intervention 1982 discharges adenoidectomy Associated ANCOVA Values Back/Neck Procedures basis of small Chassin control groups David Soule descriptive statistics diagnosis-related groups Diehr discharge data discharges expected Discharges Pre/Post-Intervention Plot discharges Variable evaluation expected discharges Expected Values factors g(one-tailed geographic areas health care rates health care utilization hospital service area Hysterectomy 1986 individual Intercept internal validity Intervention Plot Maine Medical Assessment MDRG MDRG's measurement Medical Assessment Foundation methodology null hypothesis one-tailed patient Pediatric Problem 1988 pelvimetry physician practice style Plot and Associated point displacement design population post-intervention post-test values pre-test and post-test prostatectomy rate data rates expected Figure Rates Pre/Post-Intervention Plot Receiving Intervention regression analysis regression artifact regression point displacement Regression Residuals Residuals Against Expected RPD design selection bias small area analysis small area variations statistical power statistically significant t-test Tonsillectomy treatment effect treatment group Trochim and Campbell utilization rates Variable fi s.e. variation in health Wennberg and Gittelsohn