Table 2.
*The P value was calculated by the Cochran-Armitage trend test; †The P value was calculated by a chi-square test; RA, rheumatoid arthritis; DMARD, disease-modifying antirheumatic drug.
*The P value was calculated by the Cochran-Armitage trend test; †The P value was calculated by a chi-square test; RA, rheumatoid arthritis; DMARD, disease-modifying antirheumatic drug.