2017-18 HSC Section 3 Green Book

PERIOPERATIVE MEDICINE

Fig. 2. Box plot for postoperative change in polysomnography parameters measuring sleep-breathing disorders in obstructive sleep apnea (OSA) and non-OSA patients: ( A ) apnea hypopnea index, ( B ) obstructive apnea index, ( C ) central apnea index, and ( D ) hypopnea index. The box represents the interquartile range (IQR); the line inside the box represents the median; the upper whisker is drawn from the upper edge of the box to the largest value within 1.5 × IQR; the lower whisker is drawn from the lower edge of box to the smallest value within 1.5 × IQR; green “n”s and brown circles indicated the values outside 1.5 × IQR. *Ad- justed P < 0.05 versus preoperative measurement; +adjusted P < 0.05 versus same parameter in non-OSA on the same night.

Fig. 3. Box plot for postoperative change in oxygen desaturation index ( A ) and cumulative time percentage with Sp o 2 <90% (CT90, B ). The box represents the interquartile range (IQR); the line inside the box represents the median; the upper whisker is drawn from the upper edge of the box to the largest value within 1.5 × IQR; the lower whisker is drawn from the lower edge of box to the smallest value within 1.5 × IQR; green “n”s and brown circles indicated the values outside 1.5 × IQR. *Adjusted P < 0.05 versus preoperative measurement; +Adjusted P < 0.05 versus same parameter in nonobstructive sleep apnea (OSA) OSA on the same night.

Chung et al.

Anesthesiology 2014; 120:287-98

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