Multifactorial analysis of recurrence of cholecystolithiasis in Shanghai area

Table 4 Difference between multiple stones and solitary stone groups

	Multiple stones	Solitary stone	F test	P value
Mean age	45.52 ± 12.02	43.98 ± 11.47	2.438	0.115
Mean weight/height	0.382 ± 0.048	0.383 ± 0.052	0.108	0.742
Mean contraction ratio of gallbladder	0.538 ± 0.251	0.50 ± 0.28	0.528	0.524
Mean value of serum insulin*	0.586 ± 0.331	0.739 ± 0.266	7.526	< 0.01
Mean value of serum TBA	5.590 ± 1.788	5.349 ± 2.063	0.391	0.540

*Because of abnormal distribution of the value of ser um insulin, all data were changed into log value.