Table 3. Comparisons of post-treatment VAS and NPQ scores among the groups.

Variables	Post-treatment
		U	z	p
VAS (0-10 cm)
Group 1-2	61.000	-1.036	0.300
Group 1-3	17.500	-3.403	0.001
Group 2-3	31.000	-2.344	0.019
NPQ (0-100%)
Group 1-2	19.500	-3.188	0.001
Group 1-3	24.000	-2.754	0.006
Group 2-3	58.000	-0.496	0.620
VAS: Visual Analog Scale; NPQ: Northwick Park Neck Pain Questionnaire; z: Bonferroni-corrected Mann-Whitney U test.