Table 1.

Correlation between single-item assessments multiple-item assessments.

		Correlation with Subscale		Correlation with Full-Scale
Assessment	N	Correlation	p-Value	Correlation	p-Value
IBS—constipation	1950	0.728	p < 0.0001	0.614	p < 0.0001
IBS—diarrhea	1950	0.699	p < 0.0001	0.529	p < 0.0001
IBS—pain	1950	0.888	p < 0.0001	0.694	p < 0.0001
POMS-SF Anger	1838	0.477	p < 0.0001	0.389	p < 0.0001
POMS-SF Depression	1826	0.743	p < 0.0001	0.625	p < 0.0001
POMS-SF Tension	1828	0.828	p < 0.0001	0.762	p < 0.0001
POMS-SF Fatigue	1836	0.871	p < 0.0001	0.719	p < 0.0001
POMS-SF Vigor	1830	0.851	p < 0.0001	−0.048	0.042
DASS-21 Anxiety	1706	0.623	p < 0.0001	0.586	p < 0.0001
DASS-21 Depression	1709	0.800	p < 0.0001	0.705	p < 0.0001
DASS-21 Stress	1698	0.762	p < 0.0001	0.681	p < 0.0001
Mental resilience	2075	-	-	0.793	p < 0.0001
Sleep initiation problems	2041	-	-	0.739	p < 0.0001
Sleep maintenance problems	2041	-	-	0.630	p < 0.0001

Spearman’s rank correlations coefficients (Rho) are presented, which are considered significant if p < 0.05 (two-tailed). As not all of the subjects completed the full survey, the N is given for each correlation. Abbreviations: DASS-21 = depression anxiety stress scale 21 items, POMS-SF = profiles of mood states short form, IBS = irritable bowel syndrome. - = questionnaire has no subscales.