Analytic Approach
The unit of analysis in this study was the individual enrollee. The use of any EAP counseling services in 2005 served as the dependent variable. Bivariate analysis using chi-square tests for dichotomous variables was employed to compare external environmental factors, workplace characteristics, enrollee demographics, and measures of EAP counseling service use. Logistic regression analysis examined the influence of external environment, work organization, and client demographic variables on EAP counseling service use. We limited employer-level variables to the four measures described above, in light of the need for parsimony imposed by the employer sample size of 26. We used generalized estimating equations to address the issue of data clustering at the employer level. This was implemented in SUDAAN statistical software that provides robust estimators of variances