Table 5.

Incidence of OSA in patients with head and neck cancer treated either with radiotherapy ad surgery. n: Number; AHI: Apnoea–Hypopnoea Index; OSA: Obstructive sleep apnoea; NA: Not available.

Study	Patients (n)	OSA Incidence	AHI
Friedman et al. 2001 [20]	24	AHI > 5 in 91.7%	49.86
Nesse et al. 2006 [21]	33	AHI > 5 in 12%	NA
Steffen et al. 2009 [23]	31	AHI > 20 in 19%	NA
Teixeira et al. 2013 [26]	14	AHI > 5 in 92.3%	24
Gilat et al. 2013 [25]	15	AHI > 5 in 53.30%	NA