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Table 4 Association between BMI and chronic knee pain using multivariable logistic regression by sex

From: 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

BMI

4 categoriesa

Unadjusted

Model 1

Model 2

OR (95% CI)

P-value

OR (95% CI)

P-value

OR (95% CI)

P-value

Total

 Underweight

1

1

1

 Normal

1.18 (0.77–1.83)

0.45

1.38 (0.89–2.16)

0.15

1.53 (0.95–2.46)

0.08

 Overweight

1.48 (0.95–2.32)

0.09

1.79 (1.13–2.84)

0.01

1.86 (1.14–3.04)

0.01

 Obesity

2.44 (1.48–4.01)

0.00

2.64 (1.59–4.38)

0.00

2.45 (1.43–4.21)

0.00

 P for trend

1.32 (1.20–1.46)

0.00

1.34 (1.21–1.48)

0.00

1.26 (1.14–1.40)

0.00

Men

 Underweight

1

1

1

 Normal

1.83 (0.74–4.54)

0.19

0.70 (0.54–0.92)

0.01

0.79 (0.60–1.04)

0.10

 Overweight

1.58 (0.63–3.96)

0.33

1.96 (0.77–4.94)

0.16

2.32 (0.83–6.51)

0.11

 Obesity

2.44 (0.82–7.28)

0.11

3.17 (1.06–9.42)

0.04

3.48 (1.03–11.74)

0.04

 P for trend

1.00 (0.81–1.23)

0.99

1.07 (0.87–1.31)

0.54

1.07 (0.87–1.32)

0.50

Women

 Underweight

1

1

1

 Normal

0.97 (0.61–1.54)

0.90

1.13 (0.71–1.81)

0.61

1.17 (0.71–1.93)

0.53

 Overweight

1.53 (0.94–2.48)

0.09

1.71 (1.04–2.79)

0.03

1.62 (0.97–2.71)

0.07

 Obesity

1.97 (1.12–3.45)

0.02

2.36 (1.35–4.14)

0.00

2.01 (1.12–3.62)

0.02

 P for trend

1.45 (1.29–1.63)

0.00

1.45 (1.28–1.63)

0.00

1.33 (1.18–1.51)

0.00

  1. Multivariable Logistic regression analysis with complex sampling design was performed by adjusting for covariates. OR, odds ratio; 95% CI, 95% confidence interval
  2. a BMI was categorized into underweight (< 18.5 kg/m2), normal weight (18.5–24.9 kg/m2), overweight (25.0–29.9 kg/m2), and obesity (≥30.0 kg/m2)
  3. Model 1 was adjusted for age
  4. Model 2 was adjusted for Model 1 + smoking, alcohol consumption, occupation, education, household income, physical activity, depression, and duration of sleep