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

Table 2 Baseline characteristics of the females in the derivation and validation cohorts

Characteristic, females (n = 200)	Derivation cohort (n = 100)^a	Validation cohort (n = 100)^a	p-value
Age (years)	52 ± 18	49 ± 17	0.21
Female sex, n (%)	100 (100%)	100 (100%)	1.0
Height (cm)	165 ± 8	167 ± 7	0.17
Weight (kg)	69 ± 14	70 ± 16	0.89
BSA (m²)	1.8 ± 0.2	1.8 ± 0.2	0.77
LVEDV (ml)	157 ± 52	159 ± 49	0.48
LVEDVI (ml/m²)	89 ± 28	89 ± 26	0.47
LVESV (ml)	91 ± 57	88 ± 57	0.81
LVESVI (ml/m²)	47 ± 28	46 ± 29	0.95
LVSV (ml)	78 ± 21	83 ± 20	0.65
LVSVI (ml/m²)	45 ± 11	47 ± 11	0.16
LVEF (%)	53 ± 12	54 ± 11	0.44
LVM (g)	110 ± 26	112 ± 42	0.41
LVMI (g/m²)	62 ± 14	64 ± 22	0.49
ECV (%)	29 ± 4	29 ± 3	0.72
Hematocrit (%)	38 ± 4	38 ± 5	0.93
Septal wall thickness (mm)	9 ± 2	9 ± 3	0.45
Myocardial T1 (ms)	1046 ± 41	1040 ± 37	0.29
Mean blood R1 (ms⁻¹)	0.00062 ± 0.00003	0.00062 ± 0.00003	0.58
Mean blood R1* (ms⁻¹)	0.00059 ± 0.00004	0.00054 ± 0.00005	0.95

Characteristics are given as means ± standard deviations, or percentages as appropriate. p-values refer to comparison of mean values of derivation and validation cohort. ^aData missing for LV volumes, EF and mass (n = 2), and ECV (n = 4) in the derivation cohort. Data missing for ECV (n = 2) in the validation cohort

ISSN: 1532-429X