Table 2. Patient characteristics for both the groups included in the study [n(%)].

Characteristics		PDA Group	OD Group
Age (years)	Range	36–70	34–69
	Median	52	51
Gender	Male	29 (96.7)	23 (76.7)
	Female	1 (3.3)	7 (23.3)
Karnofsky Performance Status	≥80	24 (80)	25 (83.3)
	<80	6 (20)	5 (16.7)
Tumour stage (AJCC)	III	12 (40)	11 (36.7)
	IV	18 (60)	19 (63.3)
Primary site	Oral cavity	3 (10)	5 (16.7)
	Oropharynx	18 (60)	15 (50)
	Nasopharynx	1 (3.3)	0
	Larynx	5 (16.7)	6 (20)
	Hypopharynx	3 (10)	4 (13.3)