Correlation of pain pressure treshold and PSQI for elderly and young control.

Table 3: Correlation of pain pressure treshold and PSQI for elderly and young control.

			Global PSQI	Component 1	Component 2	Component 3	Component 4	Component 5	Component 6	Component 7
PPT	Control group	r	0.005	-0.145	0.248	0.036	0.310	-0.195	-0.028	0.051
	Control group	p	0.973	0.348	0.104	0.818	0.041	0.204	0.857	0.744
	Elderly group	r	-0.022	0.038	0.001	-0.010	-0.181	-0.051	0.241	0.009
	Elderly group	p	0.851	0.744	0.995	0.931	0.113	0.658	0.033	0.936

PPT: Pain pressure treshold; PSQI: Pitsburg sleep quality index; Component 1: Subjective sleep quality; Component 2: Sleep latency; Component 3: Sleep duration;

Component 4: Habitual sleep efficiency; Component 5: Sleep disturbances; Component 6: Use of sleeping medication; Component 7: Daytime dysfunction.