Selection of Lower instrumented vertebra in early-onset scoliosis at index growth rod insertion- can we predict distal add-on at graduation surgery?

For EOS, whenever an SV or STV was chosen, the incidence of revision of LIV was about 30%. The revision required was a distal add-on by one level. If the LIV was any higher than STV, the revision required a distal add-on to more than one level. Choosing a STV or SV as the distal foundation for the construct of EOS correction possibly leads to lesser rates of add-on phenomenon.