Table 4.

Correlation Between PSQI Components, SF-12 (MCS and PCS) and VAS Pain.

	MCS	PCS	VAS
1. Subjective sleep quality
r	−0.449	−0.289	0.469
P-value	< 0.0005	0.003	< 0.0005
2. Sleep latency
r	−0.372	−0.184	0.276
P-value	< 0.0005	0.064	0.005
3. Sleep duration
r	−0.440	−0.272	0.356
P-value	< 0.0005	0.006	< 0.0005
4. Habitual sleep efficiency
r	−0.511	−0.135	0.392
P-value	< 0.0005	0.178	< 0.0005
5. Sleep disturbances
r	−0.263	−0.280	0.282
P-value	0.008	0.004	0.004
6. Use of sleeping medication
r	−0.239	−0.199	−0.030
P-value	0.016	0.045	0.767
7. Daytime dysfunction
r	−0.576	−0.214	0.393
P-value	< 0.0005	0.031	< 0.0005