Table 4.

Comparison of REE between the two groups before and after surgery (x̅±s, kj/d).

Group	Before surgery	1 day after surgery	2 days after surgery	3 days after surgery
Observation group (n = 61)	4432.97 ± 367.96	5114.69 ± 434.96bcd	5497.34 ± 384.70cd	4859.10 ± 400.44d
Control group (n = 61)	4455.58 ± 389.92	5895.01 ± 498.00b	6160.08 ± 587.51b	6473.75 ± 417.87bc
t value	0.329	9.217	7.371	21.789
P value	0.742	<0.001	<0.001	<0.001

Note: b represents P < 0.05 compared with before surgery; c represents P < 0.05 compared with 1 day after surgery; d represents P < 0.05 compared with 2 days after surgery.