Table 2. Intergroup differences in the temporal changes of resting NRS, exercise NRS, and WOMAC scores and cyst volumes.

	Iontophoresis group (n=13)		Galvanic current group (n=11)		Control group (n=13)		Baseline-Second week	Baseline-Sixth week
	Median Min-Max		Median	Min-Max	Median Min-Max		p	p
NRS (resting) score
Baseline	7	5-8	7	6-8	8	6-9	0.931†,a	0.639Ø,a
Second week	2	1.5-4	3	2-5	5	3.5-7	0.015†,b	0.254Ø,b
Sixth week	1	0.5-2.5	2	2-7	4	2.5-6	0.009†,c	0.064Ø,c
p		<0.001‡		0.003‡		<0.001‡
NRS (exercise) score
Baseline	8	5.5-8	8	6-8	8	6.5-9	0.573†,a	0.149Ø,a
Second week	3	1.5-4	3	3-5	5	4-7.5	0.002†,b	0.241Ø,b
Sixth week	2	1-2	3	2-7	5	3-7	0.001†,c	0.008Ø,c
p		<0.001‡		0.001‡		<0.001‡
WOMAC score
Baseline	45.83	23.95-68.72	41.60	28.12-75	70.8	58.32-81.77	0.434Ø,a	0.434Ø,a
Second week	17.7	10.42-29.68	16.60	7.29-45.83	62.5	33.82-68.85	0.059Ø,b	0.059Ø,b
Sixth week	6.25	4.16-18.22	16.60	7.29-31.25	50	27-65.1	0.064Ø,c	0.064Ø,c
p		<0.001‡		<0.001‡		<0.001‡
Cyst volume (mL)
Baseline	2.94	1.98-8.71	1.80	0.94-4.90	6	0.45-14.35	0.046Ø,a	0.147Ø,a
Second week	1.30	0.56-3.95	1	0-2.70	1.95	0.44-9.10	0.601Ø,b	0.664Ø,b
Sixth week	1	0.20-4	0	0-1	3	0.85-8.25	0.369Ø,c	0.191Ø,c
p		<0.001‡		0.028‡		0.273‡
NRS: Numerical rating scale; WOMAC: Western Ontario and McMaster Universities Osteoarthritis Index; ‡ Friedman test; a: P value for intergroup differences of temporal changes between the iontophoresis and galvanic current groups (a value of <0.017 is considered significant); b: P value for intergroup differences of temporal changes between the galvanic current and control groups (b value of <0.017 is considered significant); c: P value for intergroup differences of temporal changes between the iontophoresis and control groups (c value of <0.017 is considered significant); †: Independent samples t-test; Ø: Mann-Whitney U test.