[Retracted] Acupuncture for Knee Osteoarthritis: A Systematic Review of Randomized Clinical Trials with Meta-Analyses and Trial Sequential Analyses

Table 2

Subgroup analyses of pain.

Outcome type		Sample size		SMD	95% CI
		TA	SA		L	U
Duration of diseases
8<	3	492	532	-0.20	-0.39	-0.01	0.04	40%
>8	3	579	549	-0.01	-0.22	0.02	0.10	0
BMI
25<	1	21	21	-0. 03	-0.63	0.58	0.93	NA
25~29.9	3	620	586	-0.18	-0.35	-0.01	0.03	45%
>29.9	3	470	514	-0.12	-0.25	0.00	0.05	0
Program length
6w	3	514	631	-0.06	-0.17	0.06	0.34	0
6~13w	6	785	756	-0.16	-0.26	-0.06	0.002	0
26w	1	142	141	-0.14	-0.35	0.08	0.21	NA
Last observation result	10	1143	1191	-0.15	-0.32	0.02	0.00001	73%

n: number of studies; TA: true acupuncture; SA: Sham acupuncture; SMD: standardized mean difference effect size; L: lower; U: upper; I²: heterogeneity.