Certain structural and functional aspects of social networks and support were compared among 157 middle-aged male Seventh-day Adventists and male neighbors of the same age range. The Adventist men were 11.2% more likely to be married (p<0.05), had="" 15%="" more="" trusted="" friends=""><0.10) and="" 31%="" more="" trusted="" relatives=""><0.005) than="" their="" neighbors.="" of="" the="" adventists="" and="" neighbors,="" 74%="" and="" 52%="" respectively="" reported="" feeling="" frequently="" cared="" for="" by="" others=""><0.001). at="" least="" weekly="" church="" attendance="" was="" practiced="" by="" 84%="" of="" the="" adventists="" and="" 30%="" of="" the="" neighbors=""><0.001). it="" is="" speculated="" that="" some="" of="" the="" favorable="" mortality="" experience="" of="" adventists="" may="" be="" causally="" related="" to="" these="" increased="" levels="" of="" social="">