Table 4: Occupational exposure to carcinogenic agents among subjects with sinonasal cancer, by smoking statusa; Lombardy region sinonasal cancer registry, 2008–2011 ( with interview).

Occupational exposureNever smokersFormer smokersCurrent smokers valueb
No.%No.%No.%

Never exposed5270.33848.73269.6Reference
Ever exposed (any agent)2229.74051.31430.40.01
 Wood dust1216.22126.91021.70.10
 Leather dust1013.51721.824.30.01
 Nickel compounds00.022.624.30.23
 Chromium compounds11.433.800.00.16
 PAH00.011.312.20.47
 Cork dust11.400.000.00.51

PAH: polycyclic aromatic hydrocarbons, SCC: squamous cell carcinoma.
a10 subjects with missing smoking history were excluded.
bFrom chi-square test (reference: never exposed).
Note: a subject may have been exposed to more than one agent in his/her occupational history.