Table 1.

Clinical features of patients with myotonic dystrophy type 1.

Family.	Patient			Age at baseline	Disease duration at baseline			Duration of follow-up	MIRS
no.	no.	Sex	Relationship	(years)	(years)	Inheritance	CTG repeats	(years)	Basal	Follow-up
1	1	M	Proband	60	17	Paternal	100	7	4	5
1	2	F	Parent	44	24	Paternal	500	20	4	5
1	3	F	Sibling	22	8	Paternal	300	19	2	4
2	4	F	Sibling	34	4	Paternal	625	15	3	3
2	5	M	Sibling	27	8	Paternal	625	16	2	3
3	6	M	Proband	24	12	Paternal	467	12	2	3
3	7	F	Sibling	24	10	Paternal	467	13	3	4
3	8	M	Parent	54	0	Unknown	66	12	1	2
4	9	M	Proband	43	10	Maternal	210	12	3	4
4	10	M	Sibling	16	2	Paternal	650	15	2	3
5	11	M	Proband	39	26	Maternal	405	9	4	5
5	12	F	Sibling	29	0	Maternal	255	16	2	4
	13	M		39	10	Maternal	467	8	3	4

MIRS: Muscular impairment rating scale.⁴⁰