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Table 2 Distribution of carotid IMT and FMD in RA patients stratified into four quartiles according to time from disease diagnosis to ultrasonographya

From: Correlation between endothelial function and carotid atherosclerosis in rheumatoid arthritis patients with long-standing disease

Time from RA diagnosis to ultrasonography Carotid IMT (mm) mean ± SD FMD (%) mean ± SD
Quartile 1, one to seven years 0.69 ± 0.17 7.4 ± 3.8
Quartile 2, 7.5 to 14 years 0.68 ± 0.16 6.6 ± 4.6
Quartile 3, 14.5 to 19.7 years 0.84 ± 0.24 4.0 ± 4.0
Quartile 4, 20 to 38 years 0.81 ± 0.12 3.3 ± 4.4
P value < 0.001 < 0.001
  1. aCarotid IMT: carotid intima-media wall thickness, FMD: flow-mediated endothelium-dependent vasodilatation, RA: rheumatoid arthritis.