Relationship between visual acuity and muscle mass in the Korean older population: a cross-sectional study using Korean National Health and Nutrition Examination Survey. Issue 12 (8th December 2019)

• Record Type: Journal Article
• Authors: Moon, Ji Hyun; Oh, Yun Hwan; Kong, Mi Hee; Kim, Hyeon Ju
• Is Part Of: BMJ open. Volume 9:Issue 12(2019)
• Publication Date: 2019-12-08
• Subjects: frailty -- muscle mass -- visual acuity; Medicine -- Research -- Periodicals; 610.72
• DOI: 10.1136/bmjopen-2019-033846
• Languages: English
• ISSNs: 2044-6055

Abstract

Abstract : Objectives: We aimed to assess the effects of visual acuity on muscle mass, which is an important indicator of health in older populations. Design: Pooled-sample cross-sectional study. Setting: Nationally representative population survey data. Participants: The present study analysed men aged 65 years or older who participated in the Korea National Health and Nutrition Examination Survey (KNHANES, 2008–2011). Primary and secondary outcome measures: Muscle mass was measured by dual-energy X-ray absorptiometry scan, and low muscle mass was defined as appendicular skeletal mass divided by height squared (kg/m 2 ) <6.43 kg/m 2 (lowest quintile of the older population in KNHANES, 2008–2011). Visual acuity was evaluated based on best-corrected visual acuity of the better eye. Results: Of the 1733 participants, 89.9% had good visual acuity. After adjusting for age, the height-adjusted appendicular skeletal muscle mass values were 7.16 and 7.00 kg/m 2 in the good and poor vision groups, respectively (p=0.042). According to our criterion for low muscle mass, the prevalence of low muscle mass was 16.4% and 34.7% in the good and poor vision groups, respectively. After adjusting for age, smoking status, alcohol consumption status, frequency of physical activity, educational level, the status of basic livelihood recipient and history of stroke, the poor visual acuity group had higher odds of low muscle mass than the good visual acuity group (OR=1.60; 95% CI 1.02 to 2.50; p=0.040). Conclusions: Older men with decreased visual acuity have low muscle mass. Poor vision might be an indicator of low muscle mass.