Scales and inventories

A few of the more commonly utilized inventories have already been described, including the insomnia severity index, the fatigue severity scale, the Epworth sleepiness scale, sleep diaries, and the Mallampati airway classification. The STOP-bang scoring model [35] is a method that was recently introduced, which strives to predict the risk of OSA without the use of polysomno-graphy, the gold-standard procedure for the diagnosis of the disorder (Figure 6.6). It includes elements of the history and physical examination, and was validated in preoperative patients. "Yes" answers to three or more questions place the patient at high risk for OSA. The questionnaire was validated in a mixed group of preoperative patients against in-lab polysomnography. Sensitivities and specificities of the questionnaire are, respectively, as follows: for mild OSA (apnea-hypopnea index, or AHI, between 6 and 15), 83.6% and 56.4%; for moderate OSA (AHI between 16 and 29), 92.9% and 43.0%; for severe OSA (AHI greater than 30), 100% and 37%.

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