Longitudinal wall fractional shortening: an M-mode index based on mitral annular plane systolic excursion (MAPSE) that correlates and predicts left ventricular longitudinal strain (LVLS) in intensive care patients

Table 3 Models constructed from the training set (n = 50): parameters and statistics

Parameters and statistics	Model 1	Model 2	Model 3
Predictor	MAPSE _sum	CAMMFS	LWFS
Intercept (b_o)	-0.618 ± 1.315	0.212 ± 1.124	-0.737 ± 0.999
	(P = 0.640)	(P = 0.851)	(P = 0.822)
Slope (b₁)	0.628 ± 0.056	1.052 ± 0.084	1.180 ± 0.078
	(P < 0.001)	(P < 0.001)	(P < 0.001)
R²	0.7266	0.7665	0.8257
MSE (dispersion)	9.34	7.98	5.95
GoF test* (P value)
Δdeviance (χ² test)	<0.001	<0.001	<0.001
HL test	>0.99	>0.99	>0.99

Intercepts and slopes are presented as mean ± SE. *Goodness-of-fit (GoF) tests. Δdeviance (χ²-test) compares the change in deviance from the null model (without predictor) to one containing the predictor. Smaller P value in indicates more significant change after adding the predictor. Hosmer-Lemeshow (HL) test examines the difference between the model and the observed data. Larger P value indicates no difference. MAPSE mitral annular plane systolic excursion, CAMMFS curved anatomical M-mode ventricular length, LWFS longitudinal wall fractional shortening, SE standard error, MSE mean squared error

ISSN: 1364-8535