Reliability of three scoring systems for assessing quality of anaesthetic induction in horses

The VAS and the novel CGS are reliable IQSS in horses, as are the widely used SDS. As the SDS are inconsistent across the literature, the VAS would be advised if multiple evaluators assess induction quality for research purposes, whereas the CGS would be selected for studies involving a single observer. We suggest routine inclusion of the VAS in the evaluation of the anaesthetic induction in horses.