Table 3.

Results of the independent samples test for optical density value of serum GLP-2 in ulcerative colitis patients and healthy control subjects

	Levene’s test of variance		t-test of mean
	F	Significance	t	df	P-value (2-sided)	Mean difference	Standard error	95% CI of mean difference
Equal variance assumed	0.501	0.488	−30.951	18	0.001	−0.187891414	0.047555924	−0.087980124, −0.287802704
Unequal variance assumed			−30.906	160.342	0.001	−0.187891414	0.048099737	−0.086097686, −0.289685143

CI, confidence interval; GLP-2, glucagon-like peptide 2.