Table 3.

Tumour site and stage association with PCF formation

Variables	PCF (N = 18) n (%)	Non-PCF(N = 94) n (%)	P value	OR (95% CI)
Diagnosis				1
Ca Larynx	8 (44.44)	67 (71.27)	0.028*	3.10 (1.11, 8.70)
Ca hypopharynx	10(55.55)	27(28.72)
Stage IV A
YES	13 (72.22)	74 (78.72)	0.624	0.70 (0.22, 2.20)
NO	5 (27.78)	20 (21.28)		1
Surgical margin positivity
YES	12 (66.66)	17 (18.08)	<0.001*	9.06 (2.97, 27.54)
NO	6 (33.33)	77 (81.91)		1
Pyriform involvement
YES	12 (66.66)	34 (36.17)	0.020*	3.53 (1.21, 10.25)
NO	6 (33.33)	60 (63.83)		1

*Statistically significant results