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Comparison of positive likelihood ratios of clinical prediction tools. (A) Derivation group, (B) validation group 1, and (C) validation group 2. The error bars represent 95% confidence intervals. MNC = modified neck circumference; STOP-BANG, Snoring, Tiredness, being Observed to stop breathing during sleep, high blood Pressure, Body mass index greater than 35 kg/m2, Age greater than 50 years, Neck circumference greater than 40 cm, and male Gender.
