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Arch Bronconeumol. 2000 Sep;36(8):436-40.

[Assessment of excessive day-time sleepiness in professional drivers with suspected obstructive sleep apnea syndrome].

[Article in Spanish]

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Unidad Médico-Quirúrgica de Enfermedades Respiratorias, Hospitales Universitarios Virgen del Rocío, Sevilla.


Excessive daytime sleepiness is a common symptom of obstructive sleep apnea syndrome (OSAS) and can be a cause of traffic accidents, creating a problem of particular importance for professional drivers given the associated death, disability and professional repercussions. We assessed whether the Epworth sleepiness scale (ESS), which is a subjective measure of daytime sleepiness, correlates well with multiple sleep latency (MSL) testing, which gives an objective measure of daytime sleepiness. We also compared each method with the results of polysomnography (apnea-hypopnea index, arousal index and minimum oxygen saturation). We studied 55 professional drivers suspected of OSAS. All answered the ESS questionnaire and underwent polysomnographic and MSL testing. We found a significant, though not relevant, correlation between the degree of excessive daytime sleepiness estimated by the ESS and by MSL testing (r = -0.41; p = 0.002). A significant, though weak, correlation was found between the ESS score and the arousal index (r = 0.26; p < 0.05). Our results do not clarify which method is best for measuring excessive daytime sleepiness in professional drivers suspected of OSAS.

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