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. 2019 Nov 13;2019(11):CD011116. doi: 10.1002/14651858.CD011116.pub3

Comparison 1. Acupuncture at P6 point versus sham acupuncture.

Outcome or subgroup title No. of studies No. of participants Statistical method Effect size
1.1 Successful completion of dental procedure 2 59 Risk Ratio (M‐H, Fixed, 95% CI) 1.78 [1.05, 3.01]
1.2 Reduction in gagging (reported by assessor ‐ treatment effectiveness) 1   Mean Difference (IV, Fixed, 95% CI) Subtotals only
1.2.1 Stage 1 1 33 Mean Difference (IV, Fixed, 95% CI) 0.40 [‐0.12, 0.93]
1.2.2 Stage 2 1 33 Mean Difference (IV, Fixed, 95% CI) 0.49 [‐0.26, 1.24]
1.2.3 Stage 3 1 33 Mean Difference (IV, Fixed, 95% CI) 0.67 [‐0.18, 1.53]
1.3 Reduction in gagging (reported by patient ‐ VAS) 1 33 Mean Difference (IV, Fixed, 95% CI) 0.86 [‐1.13, 2.85]
1.4 Reduction in gagging (reported by patient ‐ dichotomous data) 1 26 Risk Ratio (M‐H, Fixed, 95% CI) 2.57 [1.12, 5.89]