Table 2.

Significant Predictors of Perceived Constipation Severity in the Different Groups of Constipated Patients

Group	Parameter	Beta	t	P-value
All patients	Bloating severity	0.337	7.262	< 0.001
	Bristol stool form	–0.167	–3.663	< 0.001
	Total CTT	0.145	3.138	0.002
	Depression	0.102	2.193	0.029
	CTRE left colon	0.100	2.189	0.029
IBS-constipation	Bloating severity	0.329	5.106	< 0.001
	Abdominal pain severity	0.198	3.007	0.003
	Bristol stool form	–0.179	–2.939	0.004
	Total CTT	0.163	2.704	0.007
Functional constipation	Bloating severity	0.307	4.444	< 0.001
	CTRE left colon	0.193	2.794	0.006
	Total CTT	0.141	2.066	0.040
Defecation disorders	Total CTT	0.214	3.695	< 0.001
	CTRE left colon	0.184	3.184	0.002

CTT, colonic transit time; CTRE, colonic transit response to eating; IBS, irritable bowel syndrome.

The standardized coefficient Beta was calculated by stepwise linear regression. The model explains 23.7%, 31.2%, 17.1%, and 7.2% of the total variance for all patients, IBS-constipation, functional constipation, and defecation disorders respectively.

P < 0.05 is considered statistically significant.