Table 2.

The IgM levels in all groups (mg/ml, n=20).

	Upon admission	6-month follow-up	12-month follow-up
Group A	2.73±1.25	2.05±1.41*	1.86±1.61*
Group B	2.65±1.22#	1.89±1.21#*	1.71±1.11#*
Group C	2.62±1.12#	1.34±1.21#*	1.17±1.04#*
Group D	2.71±1.31#	2.27±1.21#*	1.93±1.38#*

Compared with Group A,

^#P<0.05; compared with that upon admission,

^*P<0.05.