Table 4. Correlation between postoperative complications and serum albumin level, blood loss, or operation time.

	Postoperative complications
Variables	(-)	(+)	p value
Preoperative serum albumin (g/dL)	4.53±0.39	4.33±0.48	0.025*
Blood loss (mL)	65.6±142.5	104.0±168.5	0.014*
Operation time (min)	84.5±71.0	108.4±75.2	0.0065**

Mann-Whitney U test was utilized for nonparametric statistical analysis of serum albumin level, blood loss volume, and duration time. Statistical significances of p<0.05 and p<0.01 were indicated by * and ** respectively