Table 20Duration of Smoking for Current Smokers and Ex-Smokers and Relative Risk of Head and Neck Cancer in Swedish Men. Ages 40–79 Years (Lewin et al, 1998(355))

Relative risk (95% confidence interval No. of exposed cases/exposed referents
Duration of smokingCurrent smokersEx-smokers
=45 yrs7.3 (4.8–11.0)4.4 (2.4–8.0)
  247/113  36/31
30–44 yrs6.13 (3.8–9.8)2.4 (1.5–4.0)
  120/74  48/74
<30 yrs2.4 (1.1–5.3)1.0 (0.6–1.7)
  18/27  32/129

Unexposed (never smokers: 44 cases/193 referents.

Relative risks are adjusted for age (40–54, 55–64, 65–79 yrs), region (Stockholm and the South Sweden

Healthcare area), and alcohol intake (<10, 10–19, 20–49, =50g alcohol/day).

From: 17, Head and Neck cancer

Cover of Referral Guidelines for Suspected Cancer in Adults and Children
Referral Guidelines for Suspected Cancer in Adults and Children [Internet].
NICE Clinical Guidelines, No. 27.
Clinical Governance Research and Development Unit (CGRDU), Department of Health Sciences, University of Leicester.
Copyright © 2005, National Collaborating Centre for Primary Care.

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