Table 2.

Incidence rate ratio of PJP in individual autoimmune rheumatic diseases

	N	PJP event	PY	IR	IRR	95% CI
Comparison	412468	61	2583087	0.24	Reference
RA	50341	56	383168.8	1.46	6.19	(4.31–8.89)
SLE	23716	74	195431.7	3.79	16.03	(11.42–22.50)
SjS	23048	20	126784.1	1.58	6.68	(4.03–11.07)
PM/DM	2589	21	16840.42	12.47	52.81	(32.16–86.70)
SSc	2499	7	17084.68	4.10	17.35	(7.94–37.93)
SV	924	3	6162.76	4.87	20.61	(6.46–65.70)

ARD, autoimmune rheumatic diseases; PJP, Pneumocystis jirovecii pneumonia; RA, rheumatoid arthritis; SLE, systemic lupus erythematosus; SjS, primary Sjogren’s syndrome; PM/DM, polymyositis/dermatomyositis; SSc, systemic sclerosis; SV, systemic vasculitis; PY, patient year; IR, incidence rate of 100,000 patient year; IRR, incidence rate ratio; CI, confidence interval