Comparison of Characteristics of Connective Tissue Disease-Associated Interstitial Lung Diseases, Undifferentiated Connective Tissue Disease-Associated Interstitial Lung Diseases, and Idiopathic Pulmonary Fibrosis in Chinese Han Population: A Retrospective Study

Table 4

Comparison of laboratory findings among CTD-ILD, UCTD-ILD, and IPF patients.

	CTD-ILD	UCTD-ILD	IPF	P1	P2	P3
Subject (n)	63	65	75
Erythrocyte (×10^12/L,  mean ± SEM)	4.07±0.100	4.39±0.100	4.41±0.080	0.075	0.028	0.998
Hemoglobin (mg/L, mean ± SEM)	120.08±3.186	130.31±3.159	134.53±2.244	0.071	0.001	0.645
Platelet (×10^9/L, mean ± SEM)	207.84±12.643	189.72±10.102	168.69±8.821	0.603	0.037	0.317
Hematokrit (1, mean ± SEM)	0.37±0.011	0.40±0.009	0.41±0.007	0.129	0.008	0.695
Alanine aminotransferase ALT (IU/L, mean ± SEM)	38.58±4.636	29.80±4.871	25.96±2.129	0.476	0.045	0.853
Aspartate aminotransferase AST (IU/L, mean ± SEM)	43.59±4.500	30.43±3.671	27.25±1.630	0.074	0.003	0.815
Serum albumin ALB (mg/L, mean ± SEM)	32.33±0.741	35.33±0.571	36.75±0.738	0.005	0.000	0.272
Lactate dehydrogenase LDH (IU/L, mean ± SEM)	331.81±18.282	256.10±12.395	260.56±15.083	0.003	0.010	0.994
Hydroxybutyric dehydrogenase HBDH (IU/L, mean ± SEM)	273.28±16.568	210.62±11.161	215.16±13.132	0.007	0.021	0.991
Immunoglobulin G (g/L, mean ± SEM)	15.57±1.046	14.36±0.493	13.10±0.646	0.655	0.137	0.311
Immunoglobulin A (mg/dL, mean ± SEM)	2847.26±187.573	3051.06±192.602	2781.23±204.235	0.834	0.993	0.710
Immunoglobulin M (mg/dL, mean ± SEM)	1671.00±152.988	1462.94±202.364	1110.78±73.626	0.799	0.004	0.285
Immunoglobulin E (mg/dL, mean ± SEM)	189.19±44.544	166.33±31.581	183.73±47.300	0.966	1.000	0.986
C3 (g/L, mean ± SEM)	0.85±0.033	0.92±0.024	1.01±0.026	0.306	0.001	0.034
C4 (g/L, mean ± SEM)	0.18±0.010	0.33±0.140	0.21±0.008	0.624	0.022	0.785

P1: Possibility when comparing CTD-ILD group and UCTD-ILD group. P2: Possibility when comparing CTD-ILD group and IPF group. P3: Possibility when comparing UCTD-ILD group and IPF group.