Table 2. Changes in peripheral CD19⁺Foxp3⁺ and CD19⁺TGFβ⁺ Bregs in RA patients with pulmonary interstitial disease.

Characteristics	RA (n=31) ILD		Healthy controls (n=26)	Statistics
CD19+Foxp3+ (%)	With	3.52±1.21	5.70±2.42	t=3.160, P=0.003
	Without	4.09±1.98		t=2.393, P=0.022
CD19+TGFβ+ (%)	With	32.85±8.46	47.56±10.07	t=4.899, P<0.0001
	Without	41.86±12.18		t=1.603, P=0.119

RA, rheumatoid arthritis; ILD, interstitial lung disease; TGFβ, transforming growth factor beta; Bregs, B cells.