How many close friends and relatives do you have with whom you feel at ease and can discuss private matters? How many of them do you see at least once a month? Do you participate in any groups? These are among the questions on a survey called the Berkman-Syme Social Network Index, which physicians use to determine whether someone is “socially isolated.”

Carla Perissinotto, MD, MHS, is a geriatrician who helps people live longer, more comfortable, more fulfilling lives. She works with elderly patients through UCSF Care at Home, which provides medical care to home-bound older adults. She visits patients in their home so she can assess their environment and determine the best care plan to keep them safe and living independently.