Researchers have found that feeling threatened by one's neighborhood can lead to depression in older adults, and that insomnia plays a key role in this process. The study, which looked at data from over 2,200 adults aged 65 and older, found that people who feel their neighborhood is dangerous are more likely to experience depression. Additionally, those who experience insomnia symptoms are also more likely to develop depression. The researchers suggest that insomnia acts as a "bridge" between feeling threatened by one's neighborhood and developing depression, and that addressing insomnia symptoms may be an important step in preventing depression in older adults.