Purpose. To determine if a mailed health promotion program reduced outpatient visits while improving health status. Design. Randomized controlled trial. Setting. A midsized, group practice model, managed care organization in Ohio. Subjects. Members invited (N = 3214) were high utilizers, 18 to 64 years old, with hypertension, diabetes, or arthritis (or all). A total of 886 members agreed to participate, and 593 members returned the initial questionnaires. The 593 members were randomized to the following groups: 99 into arthritis treatment and 100 into arthritis control, 94 into blood pressure treatment and 92 into blood pressure control, and 104 into diabetes treatment and 104 into diabetes control. Measures. Outpatient utilization, health status, and self-efficacy were followed over 30 months. Interventions. Health risk appraisal questionnaires were mailed to treatment and control groups before randomization and at 1 year. The treatment group received three additional condition-specific (arthritis, diabetes, or hypertension) questionnaires and a health information handbook. The treatment group also received written health education materials and an individualized feedback letter after each returned questionnaire. The control group received condition-specific written health education materials and reimbursement for exercise equipment or fitness club membership after returning the 1-year end of the study questionnaire. Results. Changes in visit rates were disease specific. Parameter estimates were calculated from a Poisson regression model. For intervention vs. controls, the arthritis group decreased visits 4.84 per 30 months (p < 0.00), the diabetes group had no significant change, and the hypertension group increased visits 2.89 per 30 months (p < 0.05), the overall health status improved significantly (−6.5 vs. 2.3, p < 0.01) for the arthritis group but showed no significant change for the other two groups, and coronary artery disease and cancer risk scores did not change significantly for any group individually. Overall self-efficacy for intervention group completers improved by −8.6 points (p < 0.03) for the arthritis group, and the other groups showed no significant change. Conclusions. This study demonstrated that in a population of 18 to 64 years with chronic conditions, mailed health promotion programs might only benefit people with certain conditions.
An operation health status monitoring algorithm of special transformers based on BIRCH and Gaussian cloud methods
