. Author manuscript; available in PMC: 2018 Jul 1.

Published in final edited form as: Exp Physiol. 2017 May 26;102(7):764–772. doi: 10.1113/EP086228

Table 1.

Comparison of demographic, haemodynamic and echocardiographic characteristics between African American and White subjects

Variable	African American (n = 74)		White (n = 74)		Range	P-value
Variable	Mean or percentage	SD	Mean or percentage	SD	Range	P-value
Age (years)	33.78	5.88	32.64	5.51	25–44	0.222
Sex (% male)	47%	–	65%	–	–	0.031
BMI (kg m⁻²)	26.76	3.78	25.29	2.62	18–38	0.007
SBP_24h (mmHg)	123.32	12.38	120.39	12.34	70–175	0.151
DBP_24h (mmHg)	75.37	9.20	73.82	8.31	43–119	0.281
lnHF-HRV (ms²)	6.52	1.16	6.34	1.12	3.2–9.8	0.337
LVMI (g m^−2.7)	40.92	8.06	39.09	8.93	25–71	0.194

Mean 24 hour systolic blood pressure (SBP₂₄), Mean 24 hour diastolic blood pressure (DBP₂₄). Natural logarithmic transformation of high-frequency heart rate variability (lnHF-HRV), left ventricular mass indexed (LVMI) to weight (in grams) and height (in metres).

Abbreviations: BMI, body mass index.