Table 1: Comparison of clinical characteristics in RA-ILD and RA-no ILD.

AllRA-ILD RA-no ILD value

Total number1036340
Gender (F/M)76/2746/1730/100.823
Mean age (year)49.1 ± 14.753.0 ± 14.842.9 ± 12.4<0.001*
Mean disease duration (years)4.3 ± 5.75.0 ± 6.73.1 ± 3.00.049*
DAS284.4 ± 1.44.9 ± 1.23.7 ± 1.3<0.001*
RF402.0 ± 1268.2555.8 ± 1599.1159.8 ± 206.70.057
Anti-CCP218.2 ± 171.7231.8 ± 178.0196.8 ± 161.10.316

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