Association with low muscle mass in patients with knee osteoarthritis in rural areas of Surin province
Keywords:
sarcopenia, knee osteoarthritis, prevalenceAbstract
Sarcopenia in patients with knee osteoarthritis (OA) contributes to increased disease severity, including decreased physical performance, increased risk of falls, increased pain intensity, and abnormal knee alignment. Previous studies on the prevalence of sarcopenia among older adults with knee OA have mostly been conducted in urban areas using various diagnostic tools, resulting in inconsistent findings. This study aimed to determine the prevalence and associated factors of sarcopenia among patients with knee osteoarthritis living in rural areas. A cross-sectional study was conducted among 197 individuals aged 50 years and older diagnosed with knee OA, attending sub-district health-promoting hospitals in Sangkha District, Surin Province, Thailand. Data were collected using general demographic questionnaires, the Mini Nutritional Assessment (MNA), and the SARC-F questionnaire for sarcopenia screening. Descriptive statistics, chi-square test, Fisher’s exact test, and independent t-test were used for data analysis.The demographic and clinical characteristics showed that most participants were female (82.2%) with a mean age of 66 years. The most common age group was 60–69 years (41.1%). Most participants (66%) had comorbidities, with an average knee pain duration of 61 months. Normal body mass index (BMI) was observed in 35% of participants, while 28.9% were classified as obese class II (BMI ≥ 30 kg/m²). Most participants had low physical activity levels (44.2%). Regarding nutritional status, 51.8% had normal nutrition, 44.7% were at risk of malnutrition, and 3.6% were malnourished. The prevalence of sarcopenia among knee OA patients was 56.9%. Factors significantly associated with sarcopenia included age group, education level, physical activity level, duration of knee pain, pain intensity, and nutritional status. The high prevalence of sarcopenia among patients with knee OA in rural areas highlights the need for early screening and assessment by physicians, physical therapists, and multidisciplinary healthcare teams. Integrating sarcopenia assessment into knee OA management plans may lead to more appropriate and effective interventions tailored to individual patient needs.
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