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Emil Girardi moved to San Francisco on New Year’s Eve in 1960. He loved everything about the city: the energy, the people, the hills. And of course, the bars, where he mixed drinks for most of his adult life.

About 10 years ago, the 83-year-old New York native had a stroke and collapsed on the sidewalk near his Nob Hill home. Everything changed.

“I didn’t want to go out of the house,” Girardi said, adding he only felt comfortable “going from the bedroom to the dining room.”

He started to fear the city’s streets — and growing older.

An out-of-state friend worried about his isolation and called a San Francisco-based nonprofit called . The organization works to relieve isolation and loneliness among the city’s seniors by pairing them with volunteers.

Little Brothers matched him with Shipra Narruhn, a computer software trainer who became involved with Little Brothers after her mother’s death. The organization started in France after World War II and now operates in several U.S. cities, including Chicago, Philadelphia and San Francisco.

Girardi and Narruhn head out to one of their favorite restaurants for lunch. Girardi said that because of their friendship, he no longer fears going out of his house or getting older. Research shows loneliness can impact seniors’ health. (Anna Gorman/KHN)

Cathy Michalec, the executive director of the local nonprofit, said older adults often become less mobile as they age. Cities like San Francisco, because of their hills, crowded streets and old housing stock, are difficult for many seniors. That can lead to isolation and loneliness, she said.

“Those 50 stairs you used to be able to go up and down all the time, you can’t go up and down all the time,” said Michalec. “The streets are crowded and sometimes unsafe. … Sometimes, our elders say, it’s easier to stay in the house.”

Across the nation, geriatricians and other health and social service providers are growing increasingly worried about loneliness among seniors like Girardi. Their concerns are fueled by studies showing it is linked to serious health problems.

Research shows older adults who feel lonely are at greater risk of memory loss, strokes, heart disease and high blood pressure. The health threat is similar to that of smoking 15 cigarettes a day, according to AARP. Researchers say that loneliness and isolation are linked to physical inactivity and poor sleep, as well as high blood pressure and poor immune functioning.

A showed that people who felt lonely — whether or not they lived with others or suffered from depression — were at heightened risk of death. It also showed that 43 percent of people over 60 felt lonely.

“If someone reports feeling lonely, they are more likely to lose their independence and they are at greater risk of dying solely from being lonely,” said Carla Perissinotto, a geriatrician and researcher at the University of California, San Francisco, who did the study.

Perissinotto said there are many causes of loneliness, including illness, hearing loss or life changes such as retirement or the loss of a spouse. “The usual social connections we have in younger life end up changing as we get older,” she said.

At first, Narruhn, 67, said she and Girardi would just visit at his apartment. She’d tell him about her travels and her adult daughter. He’d tell her about his adventures in San Francisco. He described what the city was like for a young gay man, and told her about the friends he had lost to AIDS. They talked about music, books and cooking.

“I could tell from talking to him that he had a lot of interests,” she said. “At one time, he was very sociable.”

Narruhn started bringing him music from Italy, India and Mexico. Girardi liked the ones he could snap his fingers to. Finally, Shipra convinced him to go out to lunch  and to visit a hidden, tile-covered staircase in San Francisco with her.

“Shipra came to see me and came to see me and came to see me,” he said. “Finally, she said, ‘You have to get out of the house.’”

Soon, they were going to jazz shows, on walks and to the park. Narruhn said she invited him to do eclectic things with her – chakra cleansings, Reiki healing sessions – and he was always game. Over time, his fear subsided. So did his loneliness.

“After she took me out of the house, then I didn’t want to stop,” Girardi said.

There isn’t much research on programs like Little Brothers. But Perissinotto said they can help seniors build new social connections. Other efforts to address loneliness include roommate-matching services in various states and, in the United Kingdom, a hotline.

“Maintaining connections, that touchy-feely thing, is actually really important,” Perissinotto said. “It’s hard to measure, it’s hard to quantify, but there is something real. Even though we don’t have the exact research, we have tons of stories where we know it’s [had] an effect in people’s lives.”

AARP Foundation also recently launched a nationwide online network to raise awareness about social isolation and loneliness among older adults. The network, , allows people to do a self-assessment test and reach out to others feeling disconnected.

AARP, the Gerontological Society of America and other organizations are hoping to help create more understanding of isolation and loneliness and to help lonely seniors build more social connections.

“Loneliness is a huge issue we don’t talk enough about,” said Charlotte Yeh, chief medical officer of AARP. “There is a huge stigma.”

One afternoon in November, Narruhn came by to take Girardi out to one of their favorite restaurants on Polk Street. The waiter greeted them by name. Over Italian food, they planned more visits together.

Girardi said he doesn’t fear growing older anymore. He’s surrounded by his new family. And, he said, “by snapping fingers.”

KHN’s coverage in California is funded in part by .