Age- and sex-specific reference values of biventricular strain and strain rate derived from a large cohort of healthy Chinese adults: a cardiovascular magnetic resonance feature tracking study

Table 1 Demographic characteristics of the study population

Variables	All (n = 566)	Men (n = 312)	Women (n = 254)	P value (gender)
Age (years)	42.7 ± 10.7	42.7 ± 10.4	42.8 ± 11.1	0.833
Height (cm)	166.3 ± 8.3	171.5 ± 6.1	160.0 ± 6.0	< 0.001
BMI (kg/m²)	22.9 ± 3.0	23.7 ± 2.6	21.9 ± 3.0	< 0.001
BSA (m²)	1.71 ± 0.18	1.83 ± 0.14	1.58 ± 0.12	< 0.001
HR (bpm)	67 ± 9	66 ± 9	68 ± 9	0.004
SBP (mm Hg)	114 ± 13	117 ± 11	109 ± 14	< 0.001
DBP (mm Hg)	70.5 ± 9.5	72.9 ± 8.6	67.4 ± 9.6	< 0.001
FBG (mmol/L)	5.19 ± 0.46	5.25 ± 0.45	5.13 ± 0.46	0.001
TC (mmol/L)	5.00 ± 0.91	5.04 ± 0.94	4.96 ± 0.88	0.280
TG (mmol/L)	1.13 (0.81–1.65)	1.36 (0.97–1.94)	0.91 (0.73–1.25)	< 0.001
HDL-C (mmol/L)	1.37 (1.17–1.65)	1.25 (1.06–1.45)	1.56 (1.32–1.90)	< 0.001
LDL-C (mmol/L)	2.84 ± 0.90	2.96 ± 0.91	2.69 ± 0.84	< 0.001

Normally distributed continuous variables are presented as mean ± standard deviation (SD) and non-normally distributed variables are expressed as median (interquartile range). P value is for Student’s t-test between genders
BMI, body mass index; BSA, body surface area; HR, heart rate; SBP, systolic blood pressure DBP, diastolic blood pressure; FBG, fasting blood glucose; TC, total cholesterol; TG, triglycerides; HDL-C, high-density lipoprotein cholesterol; LDL-C, low-density lipoprotein cholesterol

ISSN: 1532-429X