Research Article

[Retracted] Analysis of Risk Factors for Rheumatoid Arthritis in Yunnan: A Small-Scale Case-Control Study

Table 2

Comparison of positive rates of AKA and APF between the RA patients and controls (n (%)).

RA patients (n = 249)Controls (n = 149)χ2 valueP value

Anti-CCP
 Positive125 (50.20)8 (5.37)84.206<0.001
 Negative124 (49.80)141 (94.63)

AKA
 Positive84 (33.73%)6 (4.03%)47.014<0.001
 Negative165 (66.27%)143 (95.97%)

APF
 Positive108 (43.37%)9 (6.04%)62.599<0.001
 Negative141 (56.63%)140 (93.96%)

RA, rheumatoid arthritis; CCP, cyclic citrullinated peptide; AKA, antikeratin antibody; APF, antiperinuclear factor.