Extended reports
Osteoarthrosis of the hip in women and its relation to physical
load at work and in the home
a Department of Occupational Health, NVSO,
Karolinska Hospital, Stockholm, Sweden , b Department of Public Health Sciences,
Karolinska Institute, Solna, Sweden, c
Division of Epidemiology, IMM, Karolinska Institute, Solna,
Sweden, d Department
of Orthopaedics, Sahlgrenska University Hospital, Göteborg,
Sweden
Correspondence to: Correspondence to: Dr E Vingård, Department of Occupational Health, NVSO, Karolinska Hospital, S-171 76 Stockholm, Sweden.
Accepted for publication 13 February 1997
OBJECTIVES
The aim of this case referent study
was to investigate the relation between physical workload and
osteoarthrosis of the hip in women.
METHODSThe study base comprised all women of
ages 50-70 years, living in five counties and four towns in Sweden
1991-1994. Cases (n=230), who had undergone total hip replacement for
primary osteoarthrosis of the hip were identified by means of the
Swedish National Register of Total Hip Replacements, and the referents
(n=273) were women without hip problems randomly selected from the
study base. All women were interviewed about state of health, smoking
habits, occupational history, work in the home, sports activities, etc. Each subject's history of occupational work and work in the home up to
the age of 50 was divided into periods within each of which the work
tasks were similar, and a questionnaire for each such period was filled
in by the participants. On the basis of information given by the
referents, the women were classified as having had low, medium, and
high exposure to different factors. Relative risks (RRs) and 95%
confidence intervals (CI) were calculated.
RESULTSPhysically demanding tasks at work and
in the home were associated with increased RRs of osteoarthrosis of the
hip in those with high exposure compared with the low exposure group. A
RR in the range of 2 or higher was found for those who frequently jumped or moved between different levels (RR=2.1, CI 1.9, 4.2), who
frequently climbed stairs (RR=2.1, CI 1.2, 3.6), and who had physically
demanding tasks outside occupational life (RR=2.3, CI 1.5, 3.6). The
highest RR (RR=4.3, CI 1.7, 11.0) was found for those exposed to high
physical loads both at work and during sports activities.
CONCLUSIONHigh physical loads at work and in
the home up to the age of 50 seem to be risk factors for development of
severe osteoarthrosis of the hip in women.
© 1997 by Annals of the Rheumatic Diseases
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