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Table 4 ST-Unspecified and Cancer of the Mouth and Upper Respiratory Sites

From: Tobacco harm reduction: an alternative cessation strategy for inveterate smokers

Anatomic Site RR (95%CI) Studies Cases/Controls
Oral cavity 2.8 (1.9–4.1) 4 581/798
Pharynx 2.3 (1.2–4.4) 3 169/472
Oral cavity +pharynx 1.5 (1.1–2.0) 3 655/2718
Larynx 1.8 (0.3–9.3) 1 23/100
Oral+pharynx+larynx ----   ----
All sites 1.9 (1.5–2.3) 7 1428/3681
  1. Tables 1 to 4 are adapted from [69].