a numerical trendp=0.060
When the data were stratified by autoantibody positivity (RF, ACPA) ( online supplemental table S1–S2 ), high PM 10 exposure showed a numerical trend towards a positive association with RA-ILD mortality in the RF (+) (HR 1.54; 95% CI 0.98 to 2.42; p=0.060) and ACPA (+) (HR 1.58; 95% CI 0.99 to 2.51; p=0.054) groups; but with marginal significance.