Lifetime occupation and physical function: a prospective cohort study on persons aged 80 years and older living in a community
- A Russo1,
- G Onder1,
- M Cesari2,
- V Zamboni1,
- C Barillaro1,
- E Capoluongo3,
- M Pahor2,
- R Bernabei1,
- F Landi1
- 1Department of Gerontology and Geriatrics, Catholic University of Sacred Heart, Rome, Italy
- 2Department of Aging and Geriatric Research, University of Florida, College of Medicine, Gainesville, FL, USA
- 3Department of Clinical Laboratory Medicine, Catholic University of Sacred Heart, Rome, Italy
- Correspondence to: Dr F Landi Centro Medicina dell’Invecchiamento (CEMI), Istituto di Medicina Interna e Geriatria, Università Cattolica del Sacro Cuore, Largo Agostino Gemelli 8, 00168 Roma, Italy;
- Accepted 27 January 2006
Background: Several studies have reported predictors for loss of mobility and impairments of physical performance among frail elderly people.
Aim: To evaluate the relationship between lifetime occupation and physical function in persons aged 80 years or older.
Methods: Data are from baseline evaluation of 364 subjects enrolled in the ilSIRENTE study (a prospective cohort study performed in a mountain community in Central Italy). Physical performance was assessed using the physical performance battery score, which is based on three timed tests: 4-metre walking speed, balance, and chair stand tests. Muscle strength was measured by hand grip strength. Lifetime occupation was categorised as manual or non-manual work.
Results: Mean age of participants was 85.9 (SD 4.9) years. Of the total sample, 273 subjects (75%) had a history of manual work and 91 subjects (25%) a history of non-manual work. Manual workers had significant lower grip strength and physical performance battery score (indicating worse performance) than non-manual workers. After adjustment for potential confounders (including age, gender, education, depression, cognitive performance scale score, physical activity, number of diseases, hearing impairment, history of alcohol abuse, smoking habit, and haemoglobin level), manual workers had significantly worse physical function (hand grip strength: non-manual workers 32.5 kg, SE 1.4, manual workers 28.2 kg, SE 0.8; physical performance battery score: non-manual workers 7.1, SE 0.4, manual workers 6.1, SE 0.2).
Conclusions: A history of manual work, especially when associated with high physical stress, is independently associated with low physical function and muscle strength in older persons.
Competing interests: none declared
The ilSIRENTE Study Group is composed of the following:
Steering Committee: R Bernabei, F Landi
Coordination: A Russo, M Valeri, G Venta
Writing Panel: C Barillaro, M Cesari, L Ferrucci, G Onder, M Pahor, V Zamboni, E Capoluongo
Participants: Comune di Fontecchio: P Melonio, G Bernabei, A Benedetti; Comune di Fagnano: N Scarsella, A Fattore, M Fattore; Comune di Tione: M Gizzi; Comune di Ovindoli: S Angelosante, E Chiuchiarelli; Comune di Rocca di Mezzo: S Pescatore; Comune di Rocca di Cambio: G Scoccia; Comune di Secinaro: G Pizzocchia; Comune di Molina Aterno: P Di Fiore; Comune di Castelvecchio: A Leone; Comune di Gagliano Aterno: A Petriglia; Comune di Acciano: A Di Benedetto; Comune di Goriano Sicoli: N Colella; Comune di Castel di Ieri: S Battista; RSA Opera Santa Maria della Pace: A De Santis, M Belviso, G Filieri, L Gorga, F Cocco, P Graziani