OBJECTIVE To describe the health tare use patterns of widowers who had participated in a randomized trial of mutual support, and of a matched cohort of married men DESIGN Retrospective audit of Ministry of Health use data SETTING The family practice unit in a general teaching hospital PARTICIPANTS The 113 new widowers (61 treatment, 52 waiting-list controls) who participated in a randomized trial of mutual support, and 111 married men matched for age INTERVENTIONS Mutual support program MAIN OUTCOME MEASURES Monthly rates of visits to family physicians, psychiatrists, and all other specialists for the three cohorts RESULTS Visit rates to family physicians and specialists (SPs) for the married men M-ere stable for the 20 months of the study:, rates for the widowers rose significantly from the time of loss to the end of the intervention for FPs, f = 13.18. df=2, P<.01; for SPs, f=5.34, df=2, P=.005). Rates for FPs declined after intervention for the treatment group, but kept rising among the controls (f=4.17, df=1, P=.044). CONCLUSIONS The decreased physician visit rate among those caking parr in the mutual support program suggests that this program met some of the widowers' social support needs that would otherwise have led to the use of health care resources.