. 2018 Mar 12;6:e4490. doi: 10.7717/peerj.4490

Table 1. Clinicopathological characteristics of 233 patients with advanced head and neck cancer resection with free flap transfer.

Characteristics		Value	%
Median Age (year) [range]		54 [30, 84]
Sex	male	220	94.4
	female	13	5.6
Average BMI (Kg/m²) [range]		23.0 [14.7, 42.6]
Average preoperative albumin (g/dL) [range]		4.2 [2.5, 5.8]
Average postoperative albumin (g/dL) [range]		3.1 [1.9, 4.3]
Diabetes mellitus		53	22.7
Chronic renal disease		24	10.3
Postoperative major wound infection		60	25.8
Cancer type	SCC	233	100.0
Cancer stage	III	45	19.3
	IV	188	80.7
Salvage surgery	No	174	74.7
	Yes	59	25.3
Preoperative radiotherapy	No	184	79.0
	Yes	49	21.0
Cancer site	Oropharynx	31	13.3
	Larynx	19	8.2
	Hypopharynx	27	11.6
	Oral Cavity	156	66.9
Flap design	ALT	229	98.3
	Radial forearm	1	0.4
	AMT	3	1.3
Median follow up time (months) [range]		53.9 [0.8, 88.7]
Recurrence	Yes	75	32.2
	No	158	67.8
Recurrent site	Local	26	34.7
	Regional	30	40.0
	Distant	19	25.3
Last status	NED	154	66.1
	DOD	51	21.9
	DWOD	28	12

Notes.