Table 1.

Dysphagia definitions and classification systems

Study	Definition of dysphagia and classification system
Graham et al, 201548	Not defined
Burkus et al, 201449	Not defined
Hou et al, 201445	Not defined
Kepler et al, 201212	Bazaz Dysphagia Score, dysphagia numeric rating scalea
Coric et al, 201138	Patient self-reported
Cheng et al, 201146	Not defined
McAfee et al, 201018	Bazaz Dysphagia Score
Anderson et al, 20081	Patient self-reported
Fernández-Fairen et al, 200847	Not defined
Xie and Hurlbert, 200739	Questionnaire
Song and Lee, 200642	Not defined
Bazaz et al, 200219	Bazaz Dysphagia Score
Bruneau et al, 200143	Not defined
Bolesta et al, 200044	Not defined

^a0–10 scale similar to visual analogue scale.