Table 2.

Absolute and relative pain score (VNRS^a) changes after 2, 6, and 12 weeks of the intention-to-treat population.

			Intervention group (n=108)							Control group (n=105)
			2 weeks after baseline		6 weeks after baseline		12 weeks after baseline		2 weeks after baseline			6 weeks after baseline		12 weeks after baseline
Absolute pain score (VNRS) change, mean (SD)			−2.47 (1.74)		−2.92 (2.07)		−3.35 (2.05)		−0.33 (1.42)			−0.58 (1.65)		−0.91 (1.50)
	Cohen d, between-group comparisonb	1.35		1.26		1.37		N/Ac			N/A		N/A
	P valued, between-group comparison	<.001		<.001		<.001		N/A			N/A		N/A
Relative pain score change (%), mean (SD)			−38.0 (22.9)		−45.7 (30.6)		−53.1 (29.5)		−2.45 (24.2)			−7.14 (28.3)		−14.6 (25.3)
	Cohen d, between-group comparison	1.51		1.31		1.40		N/A			N/A		N/A
	P value, between-group comparison	<.001		<.001		<.001		N/A			N/A		N/A

^aVNRS: verbal numerical rating scale.

^bThe statistical comparison of the between-group differences was calculated using the 2-tailed t test.

^cN/A: not applicable.

^dA P value of <.05 was considered statistically significant.