Lifetime occupation is not associated with radiographic osteoarthritis of the first metatarsophalangeal joint in a cohor

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(2020) 13:61

RESEARCH

Open Access

Lifetime occupation is not associated with radiographic osteoarthritis of the first metatarsophalangeal joint in a cohort study of UK women L. Cherry1,2* , L. Gates1,3,4, N. K. Arden3,4 and C. J. Bowen1,4

Abstract Objective: The study aim was to determine whether lifetime occupation was associated with the presence of radiographic osteoarthritis (ROA) of the first metatarsophalangeal joint (MTPJ) in women. Method: Data were collected from the prospective, population-based Chingford 1000 Women study. This cohort of women, aged 45–64 years at inception, was established in 1989 from a single general practice in Chingford, UK. Data has subsequently been collected repeatedly. Data from baseline, year six and year ten was used for the purposes of this cross-sectional study. The primary outcome was the presence of dorsal view ROA of the first MTPJ. The main exposure was lifetime occupation, categorised according to levels of occupation previously defined via international consensus: 1. Sedentary, 2. Light, 3. Light manual, 4. Heavy manual. Logistic regression analyses were conducted to quantify the relationship between lifetime occupation type and the presence of ROA of the first MTPJ, adjusting for age, body mass index and lifetime high-heeled footwear use as potential interactive variables for each decade. Results: Data for 209 women were included within this study. The mean (SD) age was 57 (±5.2) years. Predominant lifetime occupation was reported as sedentary by 51.7%, as light by 0%, as light manual by 33.5% and as heavy manual by 14.8% of participants. There were no statistical associations between lifetime occupation type and the presence of ROA of the first MTPJ in either the unadjusted (OR = 0.99, CI = 0.78–1.26,P = 0.96) partially adjusted (for age and BMI; OR = 1.00, CI = 0.78–1.29, P = 0.99) or fully adjusted models (for age, BMI and lifetime high heel footwear use for each decade of working life (OR = 1.02, CI = 0.79–1.31, P = 0.91); high-heel footwear use up to 20s (OR = 0.83, CI = 0.71–1.31, P = 0.83); high-heel footwear use in 20–30s (OR = 1.00, CI = 0.75–1.3, P = 0.98); high-heel footwear use in 30–40s (OR = 1.00, CI = 0.70–1.42, P = 0.99); high-heel footwear use in 40–50s (OR = 0.90, CI = 0.58– 1.40, P = 0.65); high-heel footwear use in 50s (OR = 0.63,CI = 0.36–1.09, P = 0.10). (Continued on next page)

* Correspondence: [email protected] 1 School of Health Sciences, University of Southampton, Building 67, University Road, Southampton SO17 1BJ, UK 2 Department of Podiatry, Solent NHS Trust, Southampton, UK Full list of author information is available at the end of the article © The Author(s). 2020 Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or