Table 1 Comparison of both groups regarding body measurements, pulmonary functions, ABGs, and polysomnographic findings
From: Predictors of obstructive sleep apnea in patients with chronic obstructive pulmonary disease
Overlap syndrome (N = 42) | COPD alone (N = 18) | P value | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
Mean | SD | Median | Minimum | Maximum | Mean | SD | Median | Minimum | Maximum | ||
Age (years) | 56.86 | 10.20 | 60.00 | 25.00 | 76.00 | 52.44 | 10.20 | 51.50 | 37.00 | 74.00 | 0.067 |
smoking index | 31.93 | 32.97 | 30.00 | 0.00 | 135.00 | 13.53 | 19.69 | 2.50 | 0.00 | 70.00 | 0.05 |
BMI (kg/m2) | 42.81 | 11.31 | 39.60 | 29.00 | 73.50 | 39.12 | 11.03 | 37.25 | 23.00 | 64.40 | 0.256 |
Neck (cm) circumference | 46.47 | 8.43 | 44.00 | 35.00 | 70.00 | 42.88 | 4.98 | 42.50 | 33.00 | 52.00 | 0.209 |
FEV1% | 45.88 | 15.56 | 46.00 | 16.00 | 79.00 | 44.50 | 17.93 | 49.00 | 16.00 | 68.00 | 0.927 |
FVC % | 58.70 | 16.51 | 61.00 | 30.00 | 105.00 | 52.43 | 16.85 | 53.00 | 30.00 | 86.00 | 0.228 |
FEV1/FVC % | 58.92 | 10.35 | 63.00 | 37.10 | 69.30 | 60.11 | 6.87 | 63.00 | 48.39 | 69.00 | 0.770 |
ESS | 15.67 | 5.75 | 16.50 | 6.00 | 24.00 | 9.44 | 8.48 | 6.00 | 1.00 | 29.00 | 0.002 |
STOP-BANG score | 4.80 | 1.41 | 5.00 | 2.00 | 8.00 | 3.13 | 0.89 | 3.00 | 2.00 | 5.00 | < 0.001 |
Sleep efficiency | 87.98 | 17.83 | 93.95 | 0.00 | 100.00 | 87.39 | 14.38 | 93.50 | 58.90 | 100.00 | 0.795 |
AHIb | 36.18 | 18.65 | 30.60 | 10.30 | 83.00 | 2.92 | 1.02 | 3.00 | 1.00 | 4.00 | < 0.001 |
RDIb | 37.22 | 18.68 | 31.10 | 11.00 | 85.00 | 3.73 | 2.22 | 3.00 | 1.00 | 10.00 | < 0.001 |
T90 | 26.75 | 10.37 | 24.00 | 13.00 | 43.00 | 1.83 | 0.98 | 1.50 | 1.00 | 3.00 | < 0.001 |
ODIb | 30.67 | 17.25 | 26.00 | 0.80 | 80.30 | 3.09 | 3.15 | 2.00 | 0.00 | 12.00 | < 0.001 |
Sleep latencya | 5.05 | 1.75 | 5.00 | 2.00 | 8.00 | 13.50 | 1.54 | 13.50 | 10.00 | 15.00 | < 0.001 |
Snoring indexb | 134.38 | 168.11 | 29.50 | 0.00 | 656.00 | 71.19 | 92.96 | 24.50 | 0.00 | 279.00 | 0.407 |
Min SpO2% | 68.45 | 16.52 | 71.50 | 30.00 | 95.00 | 73.00 | 17.05 | 71.50 | 35.00 | 93.00 | 0.332 |
Mean SpO2% | 88.05 | 7.49 | 89.50 | 64.00 | 98.00 | 89.63 | 7.28 | 90.00 | 71.00 | 98.00 | 0.426 |
Wake after sleep | 32.37 | 84.96 | 5.70 | 0.00 | 545.00 | 24.62 | 36.97 | 11.40 | 1.00 | 151.00 | 0.558 |
Tachycardiab | 8.58 | 15.81 | 1.15 | 0.00 | 64.00 | 8.36 | 12.99 | 3.05 | 0.00 | 40.00 | 0.609 |
Asystoleb | 0.19 | 0.93 | 0.00 | 0.00 | 6.00 | 0.37 | 1.50 | 0.00 | 0.00 | 6.00 | 0.969 |
Bradycardiab | 7.30 | 17.94 | 0.00 | 0.00 | 77.00 | 6.25 | 14.75 | 0.00 | 0.00 | 48.60 | 0.881 |