Table 4

Change in the witnessed apnoea, snoring and Epworth Sleepiness Scale score after mandibular advancement device treatment in the success and failure groups according to the seven criteria

Criteria	No	Witnessed apnoea			Witnessed snoring			Epworth Sleepiness Scale
Criteria	No	Pre MAD	Post MAD	P values†	Pre MAD	Post MAD	P values†	Pre MAD	Post MAD	P values†
AHI<10/hour with MAD
Success	45	6.64	2.82*	0.047†	6.96	2.93*	0.022†	8.60*	3.90*	0.003†
Failure	52	6.83	3.63*	0.047†	7.29	3.92*	0.022†	11.26*	6.50*	0.003†
AHI<15/hour with MAD
Success	60	6.75	3.13	0.999	7.07	3.25	0.671	9.59	4.65*	0.524
Failure	37	6.73	3.46	0.999	7.24	3.81	0.671	10.75	6.38*	0.524
AHI<20/hour with MAD
Success	72	6.74	3.10	0.534	7.13	3.38	0.717	9.81	4.89	0.688
Failure	25	6.76	3.72	0.534	7.16	3.72	0.717	10.61	6.39	0.688
AHI<10/hour and AHI reduction of >50% with MAD
Success	44	6.64	2.77*	0.033†	6.95	2.89*	0.016†	8.64*	3.59*	0.001†
Failure	53	6.83	3.66*	0.033†	7.28	3.94*	0.016†	11.17*	6.70*	0.001†
AHI<15/hour and AHI reduction of >50% with MAD
Success	59	6.78	3.14	0.793	7.03	3.24	0.528	9.43	4.58*	0.295
Failure	39	6.68	3.45	0.793	7.29	3.82	0.528	10.97	6.42*	0.295
AHI<20/hour and AHI reduction of >50% with MAD
Success	61	6.77	2.95*	0.240	7.13	3.16*	0.322	9.54	4.24*	0.033†
Failure	36	6.69	3.78*	0.240	7.14	3.97*	0.322	10.84	7.06*	0.033†
AHI reduction of >50% with MAD
Success	66	6.79	3.02	0.391	7.12	3.20*	0.252	9.59	4.20*	0.009†
Failure	31	6.65	3.77	0.391	7.16	4.03*	0.252	10.79	7.67*	0.009†

*P value <0.05 for the unpaired t-test.
†P value <0.05 for the repeated-measure analysis of variance (adjusted for the age, sex, body mass index and compliance).
AHI, apnoea–hypopnoea index; MAD, mandibular advancement device.