Table 4.

Statistical data from the external validation of CoMSIA/EHA model.

Parameter	Validation Criteria	CoMSIA/EHA
Q2	Q2 > 0.5	0.571
r2	r2 > 0.6	0.715
$|r_0^2-r_0^{\prime 2}|$	$|r_0^2-r_0^{\prime 2}|<0.3$	0.02
k	0.85 < k < 1.15	1.026
$\frac{r^2-r_0^2}{r^2}$	$\frac{r^2-r_0^2}{r^2}<0.1$	0.02
K'	0.85 < k′ < 1.15	0.973
$\frac{r^2-r_0^{\prime 2}}{r^2}$	$\frac{r^2-r_0^2}{r^2}<0.1$	0.084
$r_m^2$	$r_m^2>0.5$	0.628
$r_m^{\prime 2}$	$r_m^{\prime 2}>0.5$	0.581