Table 2.

Comparison of renal function indicators among patients in each group ($\overline{x}\pm s$).

Group	Number of cases	BUN (mmol/L)	SCr (μmol/L)
Mild group	35	5.11 ± 0.45①②③	83.22 ± 4.22①②③
Moderate group	35	5.39 ± 0.39①②	88.98 ± 3.98①②
Severe group	20	5.78 ± 0.29①	93.29 ± 4.01①
Control group	50	4.68 ± 0.33	76.11 ± 3.98
F	—	50.003	116.111
P value	—	<0.001	<0.001

Compared with the control group, ^①P < 0.05; compared with the severe group, ^②P < 0.05; compared with the moderate group, ^③P < 0.05.