Except for a constant scale factor, ECVI is the same as AIC:
.
The columns labeled LO 90 and HI 90 give the lower limit and upper limit of a 90% confidence interval for the population ECVI:
,
.
See also AIC.
Use the \ecvi text macro to display ECVI on a path diagram. Use \ecvilo and \ecvihi to display the lower and upper limits of the 90% confidence interval.