Table 2 Correlation of degree of airway obstruction (GOLD stage) and severity of OSA in overlap syndrome
From: Predictors of obstructive sleep apnea in patients with chronic obstructive pulmonary disease
OSA severity | GOLD stage | Overlap group, n = 42 | P value |
|---|---|---|---|
Mild OSA (AHI 5–15/h) | Stage 2 FEV1 (50–79%) | 3 (42.8%) | < 0.001 |
Stage 3 FEV1 (30–49%) | 2 (28.5%) | ||
Stage 4 FEV1 (< 30%) | 2 (28.5%) | ||
Moderate OSA (AHI 15–30/h) | Stage 2 FEV1 (50–79%) | 4 (28.5%) | 0.040 |
Stage 3 FEV1 (30–49%) | 8 (57.3%) | ||
Stage 4 FEV1 (< 30%) | 2 (14.3%) | ||
Severe OSA (AHI > 30/h) | Stage 2 FEV1 (50–79%) | 6 (27.27%) | 0.004 |
Stage 3 FEV1 (30–49%) | 8 (40.9%) | ||
Stage 4 FEV1 (< 30%) | 7 (31.8%) |