A new study finds people with heart disease who live alone tend to die sooner than those sharing their home with others.
The reasons are still unclear but scientists say access to regular medicine might be involved.
Writing in the Archives of Internal Medicine researchers speculate that in people younger than 80 years old living alone could signal psychological and social problems such as job strain or loneliness.
Other causes might be due to possible social isolation and loneliness. Researchers say that these are more challenging to fix.