Table 5.

Pearson’s coefficient of correlations (R) of different covariates with the number of angina episodes.

	Pearson’s correlation coefficient (R)	p-value
Sleep efficiency	− 0.061	0.008*
BMI	− 0.043	0.046*
ADBP	− 0.095	0.000*
ASBP	− 0.029	0.125
Sleep N3	− 0.039	0.062
Gender	− 0.016	0.269
Alcohol use	− 0.004	0.433
Cigarette packs per year	0.031	0.110
Sleep time	− 0.055	0.014*
Age	0.097	0.000*

BMI: body mass index; ADBP: average diastolic blood pressure; ASBP: average systolic blood pressure; Sleep N3: percent time in stage N3 of sleep.

*Significant.