Tuija, Martelin, Koskinen Seppo, Kattainen Anna, Sainio Päivi, and Reunanen Antti. 2002. “Changes and Differentials in the Prevalence of Activity Limitations Among Finns Aged 65-74: Comparison of the Mini-Finland Health Examination Survey (1978-80) and the FINRISK-97 Senior Survey (1997)”. Finnish Yearbook of Population Research 38 (January):55-75. https://doi.org/10.23979/fypr.44969.