Table 2.

Association between grade of OSA and duration of edentulism.

Grade of OSA	Duration of edentulism
	6-9 months	10-12 months	13-15 months	>15 months
Overall (n=414)
None/Minimal (n=90)	41 (45.6%)	22 (24.4%)	27 (30.0%)	0 (0.0%)
Mild (n=109)	15 (13.8%)	30 (27.5%)	61 (56.0%)	3 (2.8%)
Moderate (n=177)	8 (4.5%)	97 (54.8%)	70 (39.5%)	2 (1.1%)
Severe (n=38)	0 (0.0%)	0 (0.0%)	20 (52.6%)	18 (47.4%)
H=100.76; p<0.001 (Kruskal-Wallis H test)

Percentages have been calculated row-wise.