Effect of lateral versus supine positioning on hypoxaemia in sedated adults: multicentre randomised controlled trial.

47 The interaction tests did not reach statistical significance in prespecified subgroups defined by age, BMI, smoking status, large neck circumference, Mallampati class, haemoglobin level, Ramsay sedation scale score, visual analogue scale pain score, use of neuromuscular reversal agent, procedure duration, procedure category, and intraoperative opioid dosages ( fig 2 ), suggesting consistency in the effect across subgroups from a statistical perspective, even though individual subgroup results varied numerically.

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