Table 2. Association Between Polysomnographic Parameters and NAFLD Severitya.
| Polysomnographic Parameter | Non-NAFLD | Mild NAFLD | Moderate NAFLD | Severe NAFLD |
|---|---|---|---|---|
| Apnea-hypopnea index | 16.5 (4.4-60.9) b,c | 28.9 (4.1 - 120.4) | 31.9 (4.1 - 81.1)b | 49.8 (9.6 - 79.2)c |
| Oxygen desaturation index | 16.9 (3 - 53.7) b,c | 31.7 (3.8 - 132.9) | 34.8 (6.4 - 86.1)b | 58.4 (7.9 - 119.9)c |
| Lowest desaturation value, % | 81.6 (71.0 - 90.0)b,c,d | 71.5 (50.0 - 89.0)d | 71.7 (50.0 - 88.0)b | 65.0 ( 50.0 - 85.0)c,d |
| Mean nocturnal SpO2, % | 92.2 (86.9 - 84.7)e,f | 87.7 (57.7 - 95.6)f | 88.2 (72.4 - 94.4) | 84.0 (72.5 - 92.4)e |
aAll values are expressed as median (range).
bThe difference between non-alcoholic fatty liver disease (NAFLD) and moderate NAFLD groups is statistically significant (P < 0.05).
cThe difference between non-NAFLD and severe NAFLD groups is statistically significant (P < 0.001).
dThe difference between non-NAFLD and mild NAFLD groups is statistically significant (P < 0.001).
eThe difference between non-NAFLD and severe NAFLD groups is statistically significant (P < 0.05).
fThe difference between non-NAFLD and mild NAFLD groups is statistically significant (P < 0.05).