Cross-sectional analysis of self-reported sedentary behaviors and chronic knee pain among South Korean adults over 50 years of age in KNHANES 2013-2015

Table 3 Association between physical activity and chronic knee pain using multivariable logistic regression by sex

Physical activity 2 categories^a	Unadjusted		Model 1		Model 2
Physical activity 2 categories^a	OR (95% CI)	P-value	OR (95% CI)	P-value	OR (95% CI)	P-value
Total
Low physical activity	1		1		1
High physical activity	0.64 (0.55–0.73)	0.00	0.78 (0.67–0.91)	0.00	0.86 (0.74–1.01)	0.06
Men
Low physical activity	1		1		1
High physical activity	0.68 (0.52–0.89)	0.01	0.70 (0.54–0.92)	0.01	0.79 (0.60–1.04)	0.10
Women
Low physical activity	1		1		1
High physical activity	0.69 (0.59–0.82)	0.00	0.84 (0.70–1.00)	0.04	0.90 (0.75–1.08)	0.27

Multivariable Logistic regression analysis with complex sampling design was performed by adjusting for covariates. OR, odds ratio; 95% CI, 95% confidence interval
^a Levels of physical activity were categorized: high physical activity was defined as participating in moderate-intensity physical activity for at least 2 h 30 min, vigorous-intensity physical activity for more than 1 h 15 min, or a combination of moderate and high-intensity physical activity (1 min of high-intensity activity is defined as 2 min of moderate-intensity activity) over a period of 1 week. Physical activity less than that mentioned previously was defined as low physical activity
Model 1 was adjusted for age and BMI
Model 2 was adjusted for Model 1 + smoking, alcohol consumption, education, household income, depression, and duration of sleep

ISSN: 1471-2458