Table 1

Demographic and clinical findings

Subject	Sex	Age (y)	Final diagnosis	Duration of dysphagia prior to evaluation (months)	Presentation to diagnosis of cause of dysphagia (months)	Head and neck muscle involvement	Muscle weakness	Aspiration	Dysphagia severity	UOS restrictive feature
*Patient did not undergo pharyngeal videomanometry.
UOS, upper oesophageal sphincter.
Idiopathic presentation
1	F	81	Polymyositis	180	0.46	No	No	No	Mild	Yes
2	F	59	Polymyositis	72	11	No	No	Yes	Mild	Yes
3	F	74	Polymyositis	24	0.23	Yes	Proximal	Yes	Severe	Yes
4	F	67	Polymyositis	6	0.23	No	Proximal	Yes	Moderate	No
5	M	69	Polymyositis	36	45	No	No	Yes	Mild	Yes
6	M	75	Interstitial myositis	11	0.46	Yes	Yes	Yes	Severe	No
7	M	74	Polymyositis	19	0.7	Yes	Proximal	No	Mild	Yes
8	F	88	Polymyositis	144	0.06	Yes	Proximal	Yes	Mod-sev	Yes
9*	F	22	Polymyositis	1	0.23	No	Proximal	No	—	No
Confirmed myopathy at time of referral
10	M	45	Inclusion body myositis	18	Prior 4 months	Yes	Proximal limb	No	Mild	Yes
11	M	71	Dermatomyositis	16	Prior 10 years	No	Proximal limb	Yes	Mild	No
12	F	86	Polymyositis	24	Prior 4 years	No	Proximal limb	No	Mild-Mod	Yes
13	F	74	Polymyositis	36	0.46	Yes	Proximal, facial	Yes	Severe	Yes