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Table 2 Threshold effect analysis of health literacy on illness perception using piecewise linear regression model

From: Association of health literacy with illness perception of Chinese community patients with chronic disease

Models

β (95%CI)

P-value

Model I

  

 Fitting by a standard linear model

-0.16 (-0.19, -0.13)

< 0.001

Model II

  

Inflection point (K)

22.22

 

 Health literacy < 22.22

0.12 (0.03, 0.21)

0.009

 Health literacy ≥ 22.22

-0.23 (-0.27, -0.19)

< 0.001

P for log-likelihood ratio test

 

< 0.001

  1. Note: Model I, one-line linear regression; Model II, two-segment regression. The 95% CI represented the confidence interval, and β represented the effect size. Adjusted for sex, age, ethnicity, BMI, education, ACCI, home address, hukou, spouse, income, medicare, alcohol consumption, and cigarette smoking. ACCI: age-adjusted Charlson comorbidity index
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BMC Public Health

ISSN: 1471-2458

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