Table 2.

PCT levels (ng/mL) of each group

Group	n	Hospital admission time (d)
		7	14	21	28
ARDS	18	1.79±0.35*	2.32±0.17*	3.69±0.12*	3.58±0.09*
ARDS+MODS	24	3.25±1.22**,#	9.35±2.34**,##	6.48±0.78**,##	4.67±1.42**,#
Control	55	1.01±0.21	1.28±0.25	2.29±0.21	2.19±0.19

Compared with the control group:

^* P<0.05;

^** P<0.01;

compared with the ARDS group:

^# P<0.05;

^## P<0.01.