TABLE 4.

Correlation matrix: pre-race associations between indices of cardiovascular function and cognitive performance and displayed as Pearson correlation coefficient.

Variable	Cardiovascular measure												Cognitive measure
	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16
1. Systolic Blood Pressure (mmHg)	1
2. Diastolic Blood Pressure (mmHg)	0.74*	1
3. Mean Arterial Pressure (mmHg)	0.92*	0.94*	1
4. Pulse Pressure (mmHg)	0.83*	0.24	0.55*	1
5. Total Systemic Resistance (dyne⋅sec⋅cm−5)	0.34	0.1	0.23	0.40*	1
6. Rate Pressure Product (mmHg⋅bpm)	0.61*	0.78*	0.75*	0.24	−0.09	1
7. Large Arterial Compliance (mL⋅mmHg−1× 10)	0.11	0	0.06	0.16	0.28	−0.05	1
8. Small Arterial Compliance (mL⋅mmHg−1× 100)	0.27	0.13	0.21	0.29	0	0.15	0.35	1
9. Heart Rate (bpm)	−0.19	0.27	0.06	−0.50*	−0.44*	0.66*	−0.17	−0.07	1
10. Stroke Volume (mL⋅beat1)	0.43*	0.01	0.22	0.61*	0.04	0.52*	0.05	0.24	0.22	1
11. Cardiac Output (L⋅min−1)	0.44*	−0.27	0.07	0.87*	0.35	−0.14	0.15	0.22	−0.62*	0.62*	1
12. Cardiac Index (L⋅min−1⋅m−2)	0.18	−0.12	0.02	0.36	0.13	0.39	−0.01	0.19	0.3	0.85*	0.44*	1
13. Simple Reaction (ms)	0.06	−0.13	−0.05	0.2	0.39	−0.23	−0.1	0.1	−0.35	0.03	0.26	0.12	1
14. Discrimination Reaction Time (ms)	0.16	−0.14	0	0.35	0.50*	−0.19	0.24	0.09	−0.41*	0.13	0.41*	0.18	0.70*	1
15. Choice Reaction Time (ms)	0.08	−0.08	0	0.18	0.56*	−0.23	0.39	0.13	−0.38	−0.04	0.23	0	0.67*	0.69*	1
16. Memory (% Correct)	−0.37	−0.05	−0.21	−0.50*	−0.19	−0.19	−0.17	−0.3	0.13	−0.44*	−0.47*	−0.24	−0.32	−0.47*	−0.36	1

*p < 0.05.