Pre-randomization decisions and group stratification in a randomized controlled trial to improve prescribing

OBJECTIVE: To select and evaluate characteristics of primary care practice groups relevant for stratification prior to randomization. METHOD: Structured telephone interviews and pre- and post-intervention prescription data. SETTING: Additional study in an RCT to rationalize prescribing in primary care, addressing groups of pharmacists and doctors. Representatives of 61 primary care practice groups in the Netherlands. MAIN OUTCOME MEASURES: Identification and evaluation of primary care practice group characteristics related to changes in prescribing. These characteristics were evaluated by esti... Mehr ...