What is the impact of a low-cost, mail-focused health promotion program?
Description of study population: All subjects were enrolled in Healthtrac from January 1, 1986, through January 1, 1991, including 135,093 persons under age 65 and 129,982 persons over age 65, with emphasis on the 103,937 for whom followup data were available. Subjects were invited by either their employers or their health insurers to participate. Six-month followup data were available for 45,186 subjects under age 65 and for 58,721 subjects over age 65. One year followup data were available on 21,075 regular program subjects and 36,132 senior subjects; 2-year data on 4,611 and 8,460 subjects; and 30-month data on 1,193 and 5,310 subjects, respectively. Decreasing numbers over longer periods were due to recent program enrollment, loss of insurance coverage, loss of sponsorship, or death. Of eligible individuals, approximately 70% of those initially enrolled in the program continued to participate beyond the first year, and approximately 505 remained in the program at 30 months. Descrip
