Blood correction reduces variability and gender differences in native myocardial T1 values at 1.5 T cardiovascular magnetic resonance – a derivation/validation approach

Table 3 Baseline characteristics of the males in the derivation and validation cohorts

Characteristic, males (n = 200)	Derivation cohort (n = 100)	Validation cohort (n = 100)	p-value
Age (years)	49 ± 18	47 ± 18	0.40
Female sex, n (%)	0 (0%)	0 (0%)	1.0
Height (cm)	181 ± 14	180 ± 8	0.81
Weight (kg)	86 ± 14	85 ± 16	0.84
BSA (m²)	2.0 ± 0.3	2.1 ± 0.2	0.77
LVEDV (ml)	204 ± 64	207 ± 68	0.67
LVEDVI (ml/m²)	99 ± 29	100 ± 36	0.96
LVESV (ml)	103 ± 62	101 ± 64	0.71
LVESVI (ml/m²)	50 ± 29	49 ± 34	0.56
LVSV (ml)	99 ± 27	106 ± 24	0.047*
LVSVI (ml/m²)	49 ± 16	52 ± 11	0.02*
LVEF (%)	51 ± 12	54 ± 11	0.06
LVM (g)	166 ± 45	162 ± 51	1.0
LVMI (g/m²)	80 ± 20	80 ± 21	0.78
ECV (%)	27 ± 3	27 ± 4	0.60
Hematocrit (%)	42 ± 4	43 ± 4	0.41
Septal wall thickness (mm)	11 ± 2	11 ± 2	0.58
Myocardial T1 (ms)	1015 ± 39	1005 ± 46	0.10
Mean blood R1 (ms⁻¹)	0.00066 ± 0.00004	0.00066 ± 0.00003	0.57
Mean blood R1* (ms⁻¹)	0.00063 ± 0.00004	0.00063 ± 0.00004	0.98

Characteristics are given as mean ± standard deviations, or percentages as appropriate. p-values refer to comparison of derivation and validation cohort. *marks significant results

ISSN: 1532-429X