. Author manuscript; available in PMC: 2015 Feb 1.

Published in final edited form as: J Sleep Res. 2013 Aug 29;23(1):84–93. doi: 10.1111/jsr.12083

Table 2. Simple Correlations (r) among Variables.

Variable	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18
1. FMD	-	.36^**	.20^*	−.17	.04	.09	.02	.04	−.09	−.20†	.03	.02	.27^**	−.21^*	−.18	−.05	−.02	−.01
2. Sex		--	−.04	.04	.03	.05	−.11	−.07	−06	−.08	.03	−.15	.06	.05	.21^*	.13	−.14	−.08
3. Age			--	−.28^**	.40^**	.24^*	.09	.16	.02	.16	−.15	.34^**	.43^**	−.10	.52^**	−.36^**	.32^**	.24^*
4. Race				--	−.38^**	−.23^*	−.16	−.03	−.14	−.21^*	.09	−.14	−.14	−.05	.42^**	.28^**	−.02	−.13
5. BMI					--	.49^**	−.10	.17	.14	.13	.01	.25^*	.18	−.05	-.30^**	−.19†	.10	.21^*
6. Hypertension						--	.01	.01	.02	.29^**	−.04	.11	−.04	.08	.24^*	−.18	.03	.15
7. Smoking							--	−.03	.17	.13	−.17	.12	.13	.02	−.26^**	−.12	.14	−.03
8. Income								--	−.02	.02	.12	−.06	.22^*	−.18	−.10	.07	.10	.22^*
9. Perceived Stress									--	.40^**	−.07	.11	.03	.08	−.17	−.15	−.01	−.08
10.PSQI-Global										--	−.12	.17	−.10	−.02	−.20†	−.13	.07	.11
11. TST											--	−.35^**	.08	−.08	.17	.55^**	−.15	.18
12. WASO												--	.09	−.02	−.27^**	−.83^**	.26^*	.08
13. %REM Sleep													--	−.39^**	−.45^**	−.15	.28^**	.38^**
14. REM Latency														--	.14	−.11	−.26^**	−.16
15. SWS															--	.34^**	−.28^**	−.16
16. Sleep Efficiency																--	−.12	−.07
17. TAI																	--	.33^**
18. AHI																		--

FMD = Flow mediated dilation; BMI=body mass index; PSQI-Global=Pittsburgh Sleep Quality Inventory Global Score; TST =total sleep time; WASO = Wake After Sleep Onset; REM =rapid eye movement; SWS=slow wave sleep; TAI= total arousal index; AHI= apnea hypopnea index

^**

p<.01;

p<.05;

^†

p=.05 (2-tailed).