Table 2.

Summary odds ratios of acupuncture and heterogeneity for each direct comparison.

Comparison	OR (95% CI)	P-heterogeneity	I-squared	Tau-squared
Traditional acupuncture vs. NSAIDs	7.10 (2.80, 21.0)	0.697	<0.01%	<0.001
Eye acupuncture vs. NSAIDs	3.90 (1.50, 9.10)	0.790	<0.01%	<0.001
Wrist–ankle acupuncture vs. NSAIDs	5.60 (1.30, 31.0)	0.723	<0.01%	<0.001
Superficial acupuncture vs. NSAIDs	5.10 (1.20, 24.0)	0.146	5.90%	<0.001
Moxibustion vs. NSAIDs	7.60 (2.80, 27.0)	0.811	<0.01%	<0.001
Electroacupuncture vs. NSAIDs	22.0 (4.50, 120)	0.887	<0.01%	<0.001
Ear acupuncture vs. NSAIDs	13.0 (2.70, 130)	0.730	<0.01%	<0.001
Abdominal acupuncture vs. NSAIDs	5.50 (2.10, 16.0)	0.814	<0.01%	<0.001

OR: odds ratio; CI: confidence interval; NSAIDs: non-steroidal anti-inflammatory drugs.