Table 2. Effectiveness of PEMF therapy: intra- and inter-group comparisons.

Groups Parameter	PEMF group (n=33)				Sham group (n=30)				p**
	Before	After	Change	p*	Before	After	Change	p*
	treatment	treatment	D		treatment	treatment	D
Neck pain (VAS) §	8 (4-10)	3 (1-10)	4 (0-8)	0,000	8 (4-10)	4 (0-10)	3.5 (-6-10 )	0,000	0,256
Neck Pain Disability Scale	57.5±22.1	33.7±22.9		0,001	54.6±21.1	41.4±25.7		0,010	0.063†
Physical functioning§	70 (0-100)	75 (15-100)	0 (-25-35)	0,145	65 (0-100)	65 (0-100)	0 (-30-55)	0,553	0,713
Role limitations due to physical health§	12.5 (0-50)	37.5 (0-50)	0 (-50-50)	0,051	6.3 (0-50)	25 (0-50)	0 (-25-50)	0,020	0,847
Role limitations due to emotional problems§	16.6 (0-50)	33.3 (0-50)	0 (-17-50)	0,109	16.6 (0-50)	33.3 (0-50)	0 (-33.4-50)	0,051	0,629
Energy/fatigue§	10 (10-75)	50 (5-85)	10 (-35-60)	0,034	10 (5-100)	45 (0-100)	0 (-60-35)	0,301	0,704
Mental Health§	58 (24-88)	64 (22-84)	4 (-54-48)	0,296	60 (8-95)	70 (20-95)	3 (-20-60)	0,010	0,599
Social functioning§	62.5 (0-100)	56.3 (12-100)	0 (-37.5-50)	0,063	56.3 (10-100)	62.5 (12.5-100)	12.5 (-25-40)	0,006	0,621
Bodily pain§	32.5 (0-100)	62.5 (22.5-90)	22.5 (-20-67.5)	<0.001	32.3 (0-100)	57.5 (10-100)	13.8 (-22.5-67.50)	0,000	0,377
General Health§	50 (0-95)	55 (0-95)	10 (-25-60)	0,007	50 (5-95)	45 (10-95)	5 (-50-45)	0,437	0,361
PEMF: Pulsed electromagnetic field; VAS: Visual analog scale; § Median (min-max); * Within-group comparison; ** Between-group comparison; † Two-way ANOVA.