TABLE 2.

Summary of studies included pulmonary function test.

	Wu et al., (n = 83)			You et al., (n = 18)	Zhao et al., (n = 55)
FVC, % of predicted	92 (81–99)	94 (85–104)	98 (89–109)	105.1 ± 23.3	NR
DLCO, % of predicted	77 (67–87)	76 (68–90)	88 (78–101)	NR	NR
FVC, < 80% of predicted	19	13	9	3	NR
DLCO, < 80% of predicted	46	45	27	NR	9
Time of assessment	3 months	6 months	12 months	38 ± 13.4 days after hospital discharge	3 months after hospital discharge

	Lerum et al., (n = 103)	Borst et al., (n = 124)	Li et al., (n = 18)	Daher, A et al. (n = 33)	Venturelli, S et al. (n = 767)
FVC, % of predicted	94 (76–121)	NR	91.5 ± 17.3	NR	95(84–106), f
DLCO, % of predicted	83 (72–92)	81 ± 17	NR	65(53–73)	96(81–112), p
FVC, < 80% of predicted	7	NR	NR	NR	NR
DLCO, < 80% of predicted	24	41	NR	NR	NR
Time of assessment	3 months after hospital discharge	3 months after recovery	Near to discharge and 2 weeks after	56 days from discharge to follow-up	80(median)days after discharge

	Huang et al. (n = 349)	Bellan et al., (n = 224)	Liang et al., (n = 76)	Huang et al., (n = 57)	Mo et al., (n = 110)
FVC, % of predicted	NR	98.5 (90–109)	107.1 ± 12.3	100.96 ± 15.93	93.59 ± 12.25
DLCO, % of predicted	NR	79 (69–89), q	NR	78.38 ± 13.59	78.18 ± 14.29
FVC, < 80% of predicted	14	NR	NR	6	10
DLCO, < 80% of predicted	114, I	113, q	15	30	51
Time of assessment	153.0 (146.0–160.0) days after hospital discharge	4 months after hospital discharge	3 months after hospital discharge	1 month after hospital discharge	when discharged from hospital

f: n = 717, p: n = 680, q: n = 219, l: n = 334.

NR, not reported; FVC, forced vital capacity; DLCO, diffusing capacity for carbon monoxide.