article_snippet: Every two years The researchers interviewed the couples and asked whether either of the couples had been ill since the couples last session.
article_snippet: Over the 18 years, 859 marriages ended in divorce, 32 per cent of the sample group.
article_snippet: For 24 per cent of the couples, tragedy struck when one spouse died, and 44 per cent were still going strong by the time the study ended.
article_snippet: Dr Karraker added: ‘Life or death experiences may cause people to re-evaluate what is important in people lives.
article_snippet: The research was published in the Journal of Health and Social Behaviour.
highlights_snippet: The study monitored 2,700 couples in the US from 1992 to 2010 .
  