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Table 1 Patient characteristics

From: Obstructive sleep apnoea: a cause of chronic cough

  Patient 1 Patient 2 Patient 3 Patient 4
Age (years) 52 73 46 63
Gender (m/f) M F F M
Snoring Yes Yes Yes Yes
Nocturnal cough Yes Yes Yes Yes
Body mass Index (Kg/m 2 ) 35 32 37 33
Baseline cough VAS 90 95 50 80
Post CPAP cough VAS 0 5 0 0
Cough duration at OSA diagnosis (mo) 48 6 16 8
FEV 1 (%predicted) 93 61 119 100
FEV 1 /FVC (%) 78 70 84 83
PC 20 mg/ml) >16 nd >16 >16
Sputum neutrophil (nr <65%) 89 - 91 87
Sputum eosinophil (nr <2%) 0.3 - 1.4 0.5
ESS preCPAP 7 14 15 15
ESS post CPAP 3 8 7 5
AHI baseline (per hour) 36 86 62 10 (4% SpO2 dips)
SpO 2 (4% dips/hour) on CPAP 0.7 0 3 0
CPAP (cm H 2 o) 12 12 8 6
CPAP compliance (mean hours/night) 6 4 7 6
  1. NR: normal range; VAS: visual analogue score (0–100 mm worst); CPAP: continuous positive airway pressure; OSA: obstructive sleep apnoea; FEV1: forced expiratory volume; FVC: forced vital capacity; PC20: provocative concentration of methacholine causing >20% decline in FEV1; ESS: daytime Epworth Sleepiness Scale (range 0–24, nr<11); AHI: apnoea hypopnoea index (nr< 5/hour); SpO2: oxygen saturation