Table 4.

Laboratory values in the two cohorts of patients with COVID-19 with and without idiopathic pulmonary fibrosis (IPF) before and after propensity score matching

Outcome	Before propensity matching					After propensity matching
	IPF cohort (n=251)		Non-IPF cohort (n=310 809)		P value	IPF cohort (n=251)		Non-IPF cohort (n=251)		P value
	Patients with outcome	Mean (SD)	Patients with outcome	Mean (SD)		Patients with outcome	Mean (SD)	Patients with outcome	Mean (SD)
C reactive protein (mg/L)	80	70.11 (77.96)	33 169	63.50 (77.20)	0.44	80	70.11 (77.96)	70	66.40 (77.49)	0.77
Lactate dehydrogenase (U/L)	72	400.88 (212.88)	26 623	411.63 (508.58)	0.86	72	400.88 (212.88)	58	389.78 (348.61)	0.82
Erythrocyte sedimentation rate (mm/hour)	24	44.67 (31.32)	9903	51.92 (32.42)	0.27	24	44.67 (31.32)	17	42.53 (31.84)	0.83
Alanine aminotransferase (U/L)	109	47.84 (130.06)	54 603	49.69 (155.41)	0.90	109	47.84 (130.06)	98	33.15 (39.90)	0.28
Aspartate aminotransferase (U/L)	108	47.82 (103.17)	53 037	57.06 (358.16)	0.79	108	47.82 (103.17)	96	36.66 (23.07)	0.30
Bilirubin (mg/dL)	107	0.65 (0.53)	54 338	0.63 (1.06)	0.80	107	0.65 (0.53)	99	0.59 (0.34)	0.32
Ferritin (ng/mL)	70	1019.95 (1643.80)	30 142	974.95 (2785.47)	0.89	70	1019.95 (1643.80)	62	688.53 (915)	0.16
Creatinine (ng/dL)	123	1.47 (1.32)	64 487	1.18 (1.38)	0.02	123	1.47 (1.32)	115	1.59 (1.77)	0.56