If you're 40 and lonely, join the crowd. An Australian study of 1,300 people over age 18 has shown that more than one-third of adults describe themselves as lonely, and people in their 40s suffer the most. Here's some interesting facts about who is lonely and who is not:

• People with strong religious beliefs are less likely to be lonely no matter their age. Women are more likely than men to have strong religious beliefs.
• Loneliness is more common in the unemployed.
• Being retired does not necessarily lead to loneliness.
• Poorer people tend be more lonely than those who are wealthier.
• Knowing a lot of people doesn't guard against loneliness. There is no link between how long someone lives in a community and how lonely he or she feels.