Table 2.

Comparison of nutritional status before and after operation

Group	Time	Prealbumin levels (g/L)	albumin levels (g/L)
Control group (n=439)	On admission	212.42±4.23	36.86±0.41
	1 day before operation	215.45±3.98***	38.24±0.35***
	At discharge	217.98±4.18***	38.99±0.38***
Observation group (n=439)	On admission	212.52±4.18	36.75±0.45
	1 day before operation	216.76±4.33***,###	38.92±0.46***,###
	At discharge	218.47±4.38***	39.04±0.39***

Note: Comparison with the levels on admission in the same group;

^***P<0.001.

Comparison with the control group;

^###P<0.001.