Time measurement

Time spent on family care of frail older people is difficult to substantiate because of its complex nature. The aim of this study is to check the content validity of existing questionnaires measuring the time spent on caring. Comparing the activities mentioned in the questionnaires with those from other data sources (three validated scales measuring the functional limitations in day-to-day activities and a qualitative study) enabled identification of important drawbacks in the questionnaires reviewed.

The incorporation of informal care into economic evaluations of health care is troublesome. The debate focuses on the valuation of time spent on informal caregiving, while time measurement, a related and may be even a more important issue, tends to be neglected. Valid time measurement is a necessary condition for the valuation of informal care. In this paper, two methods of time measurement are compared and evaluated: the diary, which is considered the gold standard, and the recall method, which is applied more often.