Table 2.

Demographic and clinical description of DM1 patients

Variable	DM1 (n = 47)
Age (years)	41.55 (10.4)
Gender	22 M, 25 F
Age at onset*	27.6 (11.0, 12–50)
Education (years)	10.8 (2.1)
Married/cohabiting	60 %
Hearing impairment	28%
Vision impairment	49%
Fatigue	79 %
Day-time sleepiness	66 %
Reduced initiative	43 %
Brooke-rating**	0.51 (1.1, 0–5)
Grip force† (N)	97.5 (48.5)

* Results are presented in mean (sd, range).

** Brooke's functional test and grading system measuring mobility (hips and legs). In the grading system, zero implies normal function and higher values indicates increasing levels of immobility.

^† Measurement of grip force using the Grippit instrument. Mean (sd) for healthy controls = 331 (77) [16].