Self-reported vision impairment and incident prefrailty and frailty in English community-dwelling older adults: findings from a 4-year follow-up study
Ann E M Liljas, Livia A Carvalho, Efstathios Papachristou, Cesar De Oliveira, S Goya Wannamethee, Sheena E Ramsay, Kate R Walters
J Epidemiol Community Health Nov 2017, 71 (11) 1053-1058; DOI: 10.1136/jech-2017-209207