Table 3. Results of meta-analysis (continuous variable).

Variable	No. of Studies	Mean Diff.	95%CI	P-Value	Heterogeneity		Model
					I2	p
Age	18	12.38	10.82,13.95	<0.001	87.27%	0.00	Random
China	7	13.18	9.94,16.42	<0.001	84.76%	0.00	Random
Others	11	12.20	10.46,13.93	<0.001	85.88%	0.00	Random
haemoglobin	9	-1.40	-5.10,2.31	0.46	86.81%	0.00	Random
China	3	1.16	-1.82,4.14	0.45	61.92%	0.06	Random
Others	6	-3.32	-8.83,2.18	0.24	80.30%	0.00	Random
platelet count	9	-35.30	-58.11,-12.50	<0.001	93.93%	0.00	Random
China	3	-66.29	-102.31,-30.27	<0.001	93.41%	0.00	Random
Others	6	-11.87	-16.02,-7.72	<0.001	0.00%	0.89	Fixed
D-dimer	12	5.39	1.32,9.46	0.01	99.97%	0.00	Random
China	5	7.82	-0.88,16.53	0.08	99.95%	0.00	Random
Others	7	3.60	0.19,7.02	0.04	99.81%	0.00	Random
prothrombin time	6	1.32	0.42,2.21	<0.001	97.08%	0.00	Random
APTT	8	1.19	-0.34,2.72	0.13	89.28%	0.00	Random
China	5	1.56	-0.58,3.70	0.15	92.05%	0.00	Random
Others	3	0.56	-1.26,2.38	0.55	63.63%	0.06	Random
CRP	13	63.81	38.14,89.49	<0.001	98.82%	0.00	Random
China	4	75.58	38.05,113.12	<0.001	98.36%	0.00	Random
Others	9	58.49	24.50,92.49	<0.001	98.55%	0.00	Random
Procalcitonin	7	0.64	0.22,1.06	<0.001	99.88%	0.00	Random
China	3	0.26	0.11,0.41	<0.001	94.24%	0.00	Random
Others	4	0.96	0.33,1.59	<0.001	95.41%	0.00	Random
Interleukin 6	5	171.45	66.37,276.53	<0.001	99.47%	0.00	Random
China	3	209.35	43.43,375.26	0.01	99.46%	0.00	Random
Others	2	119.2	-4.08,242.48	0.06	99.28%	0.00	Random