Reduced binary logistic regression models for rheumatoid arthritis.

The original model included age, gender and ethnicity for all observations; smoking habit, anti-CCP and RF positivity for patients and relatives. Significance of the model is given in parentheses. MASP-2 levels were normalized as logarithms on base 10 (Log10). anti-CCP: anti-cyclic citrullinated peptide antibodies; n: number of included observations; &: not independent; OR: odds ratio; a: with intermediary levels, b: with low MASP-2 levels.