Table 4 Threshold effect analysis of lean body mass on osteoarthritis using a two-piecewise linear regression model.

From: Association between lean body mass and osteoarthritis: a cross-sectional study from the NHANES 2007–2018

Osteoarthritis

Adjust OR (95% CI)

P-value

LBM

 Fitting by standard linear model

0.74 (0.67, 0.80)

 < 0.0001

Fitting by two-piecewise linear model

 Inflection point

52.26

 

 < 52.26

0.56 (0.48, 0.64)

 < 0.0001

 > 52.26

0.90 (0.80, 1.01)

0.0679

Log-likelihood ratio

 < 0.001

 
  1. Age, sex, race, education level, income-to-poverty ratio, marital status, smoking status, alcohol use, vigorous recreational activity, BMI, waist circumference, stroke, diabetes, CVD, cancer, hypertension, uric acid, and CRP were adjusted.
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