Table 2.

Correlation between CH score and changes in each variable during sleep restriction and follow-up.

Change of variables	CH score
	After SR to baseline (r)	Follow-up to baseline (r)
Δ Stress	0.174	−0.050
Δ QOL	−0.006	0.386**
Δ Cortisol	0.200*	0.081
Δ TC	−0.155	0.065
Δ HDL-C	−0.112	0.040
Δ LDL-C	−0.236*	0.067

Δ (delta) of changes in each variable during sleep restriction and follow-up, respectively.

All correlations represent associations between CH score and changes in each variables.

CH = cold hypersensitivity, HDL-C = high-density lipoprotein cholesterol, LDL-C = low-density lipoprotein cholesterol, QOL = quality of life, SR = sleep restriction, TC = total cholesterol.

^*P < .05,

^**P < .001.