Table 8: Relation between myotonia and pain in DM2

	Myotonia
	None (N = 10)	Mild (N = 37)	Severe (N = 2)	p
Intensity of pain in the previous week 1	16,0 (±21,1)	32,3 (±30,3)	20,0 (±0,0)	0,259
Current pain2	4 (40,0%)	23 (62,2%)	2 (100,0%)	0,155
Level of pain (1 - no pain, 10 - the worst possible pain)1
Worst pain in the last 24 hours	2,0 (±1,4)	3,8 (±2,7)	3,5 (±0,7)	0,129
Least pain in the last 24 hours	1,9 (±1,7)	2,1 (±1,5)	1,5 (±0,7)	0,837
Average pain in the last 24 hours	1,9 (±1,4)	2,9 (±2,0)	2,5 (±0,7)	0,310
Pain at the moment	1,7 (±0,9)	2,6 (±1,9)	2,0	0,305

¹The variables are described in terms of average (± SD); difference between groups tested by ANOVA.

²The variable is described in terms of absolute and relative frequencies; difference between groups tested by chi-square test of maximum likelihood.