Table 3 Association between log2-transformed serum cotinine levels and RA using two-piecewise regression models.

From: Association between secondhand smoke exposure and rheumatoid arthritis in US never-smoking adults: a cross-sectional study from NHANES

Log2-transformed cotinine, ng/mL

Adjusted Model

 

OR (95%CI)

p-value

 <− 2.756

1.163 (1.073–1.261)

0.0002

≥− 2.756

1.003 (0.933–1.077)

0.943

Log-likelihood ratio test

 

0.004

  1. RA, rheumatoid arthritis; OR, odds ratio; CI, confidence interval.
  2. *Adjusted for age, gender, marital status, race/ethnicity, educational level, family income, hypertension, diabetes, coronary heart disease, body mass index, physical activity, alcohol user, fish intake, asthma.
Back to article page