Low risk for hip fracture and high risk for hip arthroplasty due to osteoarthritis among Swedish farmers

Research output: Contribution to journalArticle

Abstract

Summary: We aimed to study the risk of hip fracture and risk of hip arthroplasty among farmers in Sweden. Our results indicate that farming, representing an occupation with high physical activity, in men is associated with a lower risk of hip fracture but an increased risk of hip arthroplasty. Introduction: The risks of hip fracture and hip arthroplasty are influenced by factors including socioeconomic status, education, urbanization, latitude of residence, and physical activity. Farming is an occupation encompassing rural living and high level of physical activity. Therefore, we aimed to study the risk of hip fracture and risk of hip arthroplasty among farmers in Sweden. Methods: We studied the risk of hip fracture, and hip arthroplasty due to primary osteoarthritis, in all men and women aged 35 years or more in Sweden between 1987 and 2002. Documented occupations were available in 3.5 million individuals, of whom 97,136 were farmers. The effects of age, sex, income, education, location of residence, and occupation on risk of hip fracture or hip arthroplasty were examined using a modification of Poisson regression. Results: A total of 4027 farmers and 93,109 individuals with other occupations sustained a hip fracture, while 5349 farmers and 63,473 others underwent a hip arthroplasty. Risk of hip fracture was higher with greater age, lower income, lower education, higher latitude, and urban area for all men and women. Compared to all other occupations, male farmers had a 20% lower age-adjusted risk of hip fracture (hazard ratio (HR) 0.80, 95%CI 0.77–0.84), an effect that was not seen in female farmers (HR 0.96, 95% CI 0.91–1.01). Both male and female farmers had a higher age-adjusted risk for hip arthroplasty. Conclusions: Our results indicate that farming, representing an occupation with high physical activity, in men is associated with a lower risk of hip fracture but an increased risk of hip arthroplasty.

Details

Authors
  • H. Johansson
  • C. Hongslo Vala
  • A. Odén
  • M. Lorentzon
  • E. McCloskey
  • J. A. Kanis
  • N. C. Harvey
  • C. Ohlsson
  • L. Stefan Lohmander
  • J. Kärrholm
  • D. Mellström
Organisations
External organisations
  • Sahlgrenska Academy
  • Sahlgrenska University Hospital
  • University of Sheffield
  • University of Southampton
  • University Hospital Southampton
  • University of Gothenburg
  • Australian Catholic University
Research areas and keywords

Subject classification (UKÄ) – MANDATORY

  • Orthopedics

Keywords

  • Arthroplasty, Epidemiology, Hip fracture, Occupation, Osteoarthritis, Osteoporosis, Physical activity, Sweden
Original languageEnglish
Pages (from-to)741-749
JournalOsteoporosis International
Volume29
Issue number3
Early online date2018 Jan 12
Publication statusPublished - 2018 Mar
Publication categoryResearch
Peer-reviewedYes