Table 3.

Correlation matrix between the changes in PSQI, GSRS, and QOL scores in the yogurt group

	PSQI		GSRS		SF-8 sub-categories						SF-8 summary scores
					GH		VT		SF		PCS		MCS
	r*	p	r*	p	r*	p	r*	p	r*	p	r*	p	r*	p
PSQI	1.00	–
GSRS	0.08	0.094	1.00	–
GH	− 0.16	< 0.001	− 0.12	0.009	1.00	–
VT	− 0.26	< 0.001	− 0.12	0.007	0.41	< 0.001	1.00	–
SF	− 0.08	0.072	− 0.03	0.50	0.26	< 0.001	0.36	< 0.001	1.00	–
PCS	− 0.07	0.12	− 0.18	< 0.001	0.45	< 0.001	0.36	< 0.001	0.14	0.003	1.00	–
MCS	− 0.22	< 0.001	− 0.12	0.010	0.23	< 0.001	0.36	< 0.001	0.58	< 0.001	− 0.31	< 0.001	1.00	–

*Spearman's rank correlation coefficient

PSQI, Pittsburgh Sleep Quality Index; GSRS, Gastrointestinal Symptom Rating Scale; GH, general health; VT, vitality; SF, social functioning; PCS, physical component summary; MCS, mental component summary