engleski

Occupational physical demands and hip osteoarthritis

Aim: to explore the influence of occupational activities on the hip degenerative joint disease in the population sample of adult residents of Zagreb. Subjects: 295 men, 298 women, over the age of 45, Zagreb inhabitants. The mean age of men was 62.5 +/- 10.3 years and 63.5 +/- 11.0 years for women. Methods: according to physical demand related to occupation, subjects were classified into 4 categories: mostly sedentary jobs (category 1); jobs in the sitting position (category 2); jobs with low physical strain, lifting and carrying objects up to 5 kg (category 3); jobs with high physical strain (lifting and carying objects over 5 kg (category 4). Body height and weight were measured and body mass index (BMI) was calculated. radiographs of right hip were taken. The degree of osteoarthritis (OA) in an individual joint was graded using Kelgren-Lawrence scale. The data were analysed using logistic regression, with adjustments for age and BMI and Odds ratio was calculated. Kruskall-Wallis test was used to test the differences of the frequencies of hip OA between different occupations in each category. Results: The majority of men (40.3%) was included in category 1, while most of women (40.2%) were included in category 3. There was no significant difference in the frequencies of hip OA between subjects with different jobs in each category. Hip OA was more common, but not significantly, in subjects who worked in the standing position - category 2, comparing to other categories (Odds 1.41 for men (CI 0.64-3.09); Odds 1.38 for women (CI 0.58-3.30)). There was no significant risk for hip OA with increasing the duration of job, although that tendency was clear in women, especially for the category 1 (Odds 3.89 (CI 0.42-4.64)). Conclusion: we found no significant relationship between occupational physical demands and hip osteoarthritis. But our results also showed that occupations with prolonged standing could be a risk factor for developing hip OA. A general conclusion is limited by the fact that the majority of our urban population sample had jobs with small physical demand.

Osteoarthritis; hip; radiographic osteoarthritis; occupation

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