Rheumatoid factor was measured in 157 patients, and hs-cTn-I concentrations were not significantly different among RA patients in whom rheumatoid factor was present (1.17 [0.73–1.99] pg/ml, n = 112 (71%)), or absent (1.09 [0.73–1.41] pg/ml, n = 45 (29%))(p = 0.28). Here, TNNI3 is linked to rheumatoid arthritis.