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Estimating the percentage of workforce health programs in Ontario from results of a mail survey

The authors developed a procedure to estiumate characteristics of nonrespondents based on when subjects respond, using data from a survey of personnel managers from large Ontario companies. The study was designed to assess the nature and extent of employee assistance programs (EAPs) and health promotion initiatives. Results indicated that personnel managers who responded quickly were more likely to have an EAP than those who responded later. Estimates of the proportion of

nonresponders with EAPs were made by extrapolation, based on when people responded. The estimated proportion of nonresponders with EAPs was nearly identical to the actual proportion as determined by follow-up telephone interviews. Analysis also showed that companies with EAPs were more likely to have health promotion programs.