Socioeconomic factors from midlife predict mobility limitation and depressed mood three decades later findings from the AGES-Reykjavik study..

Groffen DA, Koster A, Bosma H, van den Akker M, Aspelund T, Siggeirsdóttir K, Kempen GI, van Eijk JT, Eiriksdottir G, Jónsson PV, Launer LJ, Gudnason V, Harris TB. BMC Public Health. 2013 Feb 4;13(1):101.