Table 2. Pneumonia severity in the early and late administration groups.

Radiological features	Early administration (n = 174)	Late administration (n = 449)	χ2-value	P-value
Severe pneumonia, %	19(10.92%)	40(8.91%)	0.591	0.442
Pulmonary atelectasis, %	31(17.82%)	70(15.59%)	0.457	0.499
Pleural effusion, %	34(19.54%)	105(23.39%)	1.070	0.301
Extra-pulmonary complications, %	38(21.84%)	139(30.96%)	5.127	0.024

Data are presented as numbers (percentages).