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. 2016 Aug 10;2016(8):CD011052. doi: 10.1002/14651858.CD011052.pub2

Comparison 1. Nitrous oxide ‐free vs Nitrous oxide‐based.

Outcome or subgroup title No. of studies No. of participants Statistical method Effect size
1 Accidental awareness 14   Peto Odds Ratio (Peto, Fixed, 95% CI) Totals not selected
1.1 Overall 14   Peto Odds Ratio (Peto, Fixed, 95% CI) 0.0 [0.0, 0.0]
1.2 In recovery 5   Peto Odds Ratio (Peto, Fixed, 95% CI) 0.0 [0.0, 0.0]
1.3 24 hours 7   Peto Odds Ratio (Peto, Fixed, 95% CI) 0.0 [0.0, 0.0]