Researchers at University of Otago, has found in a study that men and women who are in relationships for longer than five years are less likely to be depressed, to consider or attempt suicide, or to be dependent on alcohol or drugs. They found that longer relationships were associated with lower rates of mental health problems. The study examined 1,000 people living in New Zealand.At the age of 30, 16 per cent of people who were not in a relationship showed symptoms of depression along with 23 per cent of people who had been in a relationship for less than two years. The study found that this association remained after they controlled for other factors, such as family background and previous mental health problems. The study also found that the rate of alcohol abuse or dependence was 12 per cent among 30-year-olds who were not in a relationship and 13.5 per cent for people who had been in a relationship for less than two years.