The Association between Sitting Time and Health-Related Quality of Life According to Body Mass Index in Elderly Korean

Article information

Korean J Health Promot. 2017;17(4):209-218

Publication date (electronic) : 2017 December 28

doi : https://doi.org/10.15384/kjhp.2017.17.4.209

Yun Hwan Oh ¹^,², Ji Hyun Moon ¹^,², Mi Hee Kong ¹^,³, Bumjo Oh ⁴, Hyeon Ju Kim ¹^,³

¹Department of Family Medicine, Jeju Nation University Hospital, Jeju, Korea.

²Department of Medicine, Graduate School, Jeju National University, Jeju, Korea.

³Department of Family Medicine, Jeju National University School of Medicine, Jeju, Korea.

⁴Department of Family Medicine, SMG-SNU Boramae Medical Center, Seoul, Korea.

Corresponding author: Hyeon Ju Kim, MD, PhD. Department of Family Medicine, Jeju National University Hospital, 15 Aran 13-gil, Jeju 63241, Korea. Tel: +82-64-717-1830, Fax: +82-64-717-1581, fmhjukim@hanmail.net

Received 2017 October 19; Accepted 2017 November 30.

Abstract

Background

Although obesity and health-related quality of life (HRQOL) in elderly are well known to be associated with obesity and sitting time, it is unclear whether effect of sedentary lifestyle on HRQOL is affected by body mass index (BMI) or not. So we analyzed the relationship between sitting time and HRQOL according to BMI groups in elderly Korean.

Methods

Participants aged over 60 from the 6th Korea National Health and Nutrition Examination Survey (2014 and 2015) were included. Participants were classified as normal weight and overweight/obese groups. Mean sitting times were compared between groups according to the EuroQol 5 dimension (EQ-5D) And logistic regression analyses were performed.

Results

Men with mobility, usual activity, or pain/discomfort domain problem had longer sitting time. Women with a problem in every domain had longer sitting time. Overweight/obese women with problem showed longer sitting time. Odds ratios (ORs) of mobility, usual activity, pain or discomfort, and low EQ-5D score domain were increased regardless of BMI groups in men. But, ORs of all domains were increased only in overweight/obese group in women.

Conclusions

In elderly Korean, prolonged sitting time associated with decreased HRQOL. Impaired HRQOL is associated with increased sitting time regardless of BMI in men. But only overweight/obese group showed association between prolonged sitting time and impaired HRQOL in women. These results represents that decrease in quality of life according to the increase of the sitting time differs according to the BMI in elderly Korean women.

Keywords: Aged; Sedentary lifestyle; Body mass index; Obesity; Quality of life

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This is an open-access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/by-nc/3.0/) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.

Figure 1

Mean sitting time according to EQ-5D domain problem by sex. Shown are comparisons of adjusted mean sitting times between subjects with or without problem within each EQ-5D domain. P-values were calculated by t-test. Sitting time were adjusted for age, alcohol, smoking, physical activity, residential area, income, education, marital status, and comorbidities (hypertension, hypercholesterolemia, diabetes, coronary heart disease, stroke, COPD, arthritis, and cancer).

Abbreviations: EQ-5D, EuroQol comprising five dimensions; COPD, chronic obstructive pulmonary disease.

^aP<0.01.

Figure 2

Mean sitting time according to EQ-5D domain problem by sex and BMI categories. Shown are comparisons of adjusted mean sitting times between subjects with or without problem within each EQ-5D domain. P-values were calculated by t-test. Sitting time were adjusted for age, alcohol, smoking, physical activity, residential area, income, education, marital status, comorbidities (hypertension, hypercholesterolemia, diabetes, coronary heart disease, stroke, COPD, arthritis, cancer).

Abbreviations: EQ-5D, EuroQol comprising five dimensions; BMI, body mass index; COPD, chronic obstructive pulmonary disease.

^aP<0.01.

^bP<0.05.

Table 1

Baseline characteristic according to sex and BMI categories^a

Abbreviations: BMI, body mass index; LPA, low physical activity; MPA, moderate physical activity; HPA, high physical activity; COPD. chronic obstructive pulmonary disease; EQ-5D, EuroQol comprising five dimensions.

^aValues are represented as number (%) or mean±standard error unless otherwise indicated.

^bP-value by independent t-test (conticuous variables) or χ² test (categorical variavles).

^cDefined as consuming more than 7/5 (man/woman) standard alcoholic drinks at one time more than twice a week.

Table 2

ORs and 95% CI for impaired status of health related quality of life^a per hour increase in sitting time by sex and BMI categories

Abbreviations: OR, odds ratio; CI, confidence interval; BMI, body mass index; EQ-5D, EuroQol comprising five dimensions; COPD, chronic obstructive pulmonary disease.

Values are presented as OR (95% CI); OR (95% CI) by logistic regression analyses.

^aImpaired status of health related quality of life: some or extreme problems in EQ-5D domains and the lowest 20% in EQ-5D index score.

^bModel 1: adjusted for age

^cP<0.05.

^dP<0.01.

^eModel 2: adjusted for age, alcohol, smoking, physical activity, residential area, income, education, and marital status.

^fModel 3: adjusted for age, alcohol, smoking, physical activity, residential area, income, education, marital status, and comorbidities (hypertension, hypercholesterolemia, diabetes, coronary heart disease, stroke, COPD, arthritis, and cancer).