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Table 2 Polysomnography results

From: Obstructive sleep apnoea accelerates FEV1 decline in asthmatic patients

Characteristics No OSA Mild-Moderate OSA Severe OSA p value
n = 10 n = 33 n = 34
Total sleep time (minutes) 288.2 ± 88.2 268.3 ± 80.7 253.8 ± 74.6 0.207
Sleep efficiency (%) 76.1 ± 22.9 75.8 ± 16.1 72.1 ± 18.0 0.506
AHI event. h−1 2.4 ± 1.5 16.2 ± 6.6 61.4 ± 20.0 0.001
ODI event. h−1 1.7 ± 1.7 14.5 ± 6.1 52.1 ± 22.8 0.001
Average SaO2 (%) 95.0 ± 1.3 93.1 ± 3.0 91.4 ± 3.3 0.001
Lowest SaO2 (%) 88.2 ± 6.0 82.2 ± 5.5 74.7 ± 9.7 0.001
SaO2 < 90% (%) 0 ± 0 9.1 ± 18.2 20.5 ± 25.9 0.001
SaO2 < 80% (%) 0 ± 0 0.2 ± 0.4 3.3 ± 5.2 0.021
Wake % 13.9 ± 8.1 22.4 ± 13.7 22.7 ± 17.8 0.226
N1 % 20.8 ± 11.0 16.5 ± 11.0 22.3 ± 10.7 0.423
N2 % 27.6 ± 11.5 28.8 ± 11.2 34.1 ± 14.1 0.125
N3 % 23.6 ± 8.4 22.1 ± 10.8 13.4 ± 9.8 0.001
REM % 14.1 ± 3.4 10.3 ± 8.5 7.4 ± 5.9 0.013
  1. Data are presented as mean ± SEM, or number (percentage)
  2. Abbreviations: OSA obstructive sleep apnoea, AHI apnoea-hypopnoea index, ODI oxygen desaturation index, SWS slow wave sleep, REM rapid eye movement, CPAP continuous positive airway pressure