From: The relationship between upper airway collapse and the severity of obstructive sleep apnea syndrome: a chart review
Effect
AHI
Point estimate
95 % confidence limits
LPW severe vs mild
severe
3.905
2.121
7.187
moderate
1.568
0.873
2.817
LPW moderate vs mild
1.960
1.043
3.682
1.269
0.720
2.238