Mein, Gill; Seale, Clive; Rice, Helen; Johal, Suneeta; … - In: Social Science & Medicine 75 (2012) 12, pp. 2345-2352
Research that follows people over a period of time (longitudinal or panel studies) is important in understanding the ageing process and changes over time in the lives of older people. Older people may choose to leave studies due to frailty, or illness and this may diminish the value of the...