Table 6.

Reliability and validity studies of mental health estimates

First author (year)	Focus of research	Research findings
Andresen (2003)	Reliability test/retest of quality of life measures among Missouri respondents	Overall health (k= .75)
		Poor physical health days (k= .71)
		Poor mental health days (k= .67)
		Limited activity days (k= .57)
		Healthy days (k= .75)
		Frequent mental distress (k= .58)
		Frequent physical distress (k= .64)
Kapp (2009)	Test/retest of quality of life measures among cancer survivors and other respondents	Physical distress(k=.72)
		Activity limitation (k=.75)
		Social and emotional support (k=.57)
		Life satisfaction (k=.61)
		Pain (k=.75)
		General health (k=.65)