Correlate as named by investigatorPeople investigatedFinding
Race
Couples, USA, followed 12 years, 1980-1992
White
16+ aged, general public, United Kingdom, 2006
Race
55-69 aged men, USA, followed 5 years, 1976-1981
Race
44-85 aged, followed 4 years before and after retirement, USA, 2008/12--2010/14
Race
Female pensioners, followed 9 years, USA, 1982-1991.