Table 2.

Association between the anteroposterior obstruction at the velum and AHI grades

Grade of AP collapse at velum	Grade of OSA as per the AHI			Total (62)
	Mild OSA (13) (%)	Moderate OSA (16) (%)	Severe OSA (33) (%)
0	23.08	87.50	60.61	37 (59.68%)
1	30.77	6.25	3.03	6 (9.68%)
2	46.15	6.25	36.36	19 (30.64%)

Mild OSA AHI 5–15, Moderate OSA AHI > 15–30, Severe OSA AHI > 30; figures in parenthesis denotes total number of patients in that group; AP Anteroposterior, OSA Obstructive sleep apnoea, AHI Apnea–hypopnea index

p = 0.002, Pearson Chi-Square value