. 2015 Dec 10;89(1058):20150488. doi: 10.1259/bjr.20150488

Table 3.

Nodal involvement at presentation by site and histology

Site/histology	% nodal involvement (n)	p-value (compared with the reference standard)	Levels at highest risk
All small cell	13.8 (29)	0.26^b	II^a, III^b, contralateral^a
Nasal/ethmoid SNUC	16.7 (60)	0.02^a	II^a
Non-nasal/non-ethmoid SNUC	32.7 (52)	<0.001^a	I^a, II^a, III^a, contralateral^b, parotid^b
T2 glottic larynx without supraglottic extension (reference standard)	7.1 (562)	N/A	N/A
T2 glottic larynx with supraglottic extension	9.7 (1490)	N/A	N/A

Reference standard (T2 glottic without supra/subglottic involvement = 7.1%, n = 562).

^{^a}

p < 0.05.

^{^b}

p > 0.05, but absolute incidence higher than T2 glottic larynx with subglottic or supraglottic extension patients receive elective nodal treatment as standard of care.