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Table 7 Exposure to wood dust, tobacco smoking and formaldehyde in sinonasal cancer cases with and without K-ras mutations.

From: K-rasmutations in sinonasal cancers in relation to wood dust exposure

   K-ras mutations   
Characteristics Total Mutation/wild type OR1 (95%CI) OR2 (95%CI)
Wood dust exposure     
   No 134 4/130 1 1
   Yes 40 4/36 3.6 (0.9–15.2) 2.0 (0.2–16.5)
Age 174 8/166 0.97 (0.92–1.02) 1.0 (0.9–1.1)
Sex     
   Male 111 7/104 1 1
   Female 63 1/62 0.2 (0.03–2) 0.3 (0.03–3.1)
Tobacco smoking     
   No 15 2/13 1 1
   Yes 69 5/64 0.5 (0.1–2.9) 0.4 (0.1–2.6)
   Unknown 90 1/89 0.1 (0.001–0.9) -
Formaldehyde exposure     
   No 50 4/46 1 1
   Yes 35 3/32 1.1 (0.2–5.1) 0.5 (0.1–3.9)
   Unknown 89 1/88 0.1 (0.01–1.2) -
  1. The table shows the influence on sex, age and exposure to tobacco smoking, and formaldehyde to the odds ratios for having a K-ras mutation. Information on exposures was based on interview and registry data. Information on smoking and exposure to formaldehyde could only be obtained from interviewed persons, which explains the number of persons with unknown status. 1 Unadjusted odds ratio, 2 Mutually adjusted odds ratio.