Table 2 Relative risk (RR) of squamous cell and basal cell carcinoma of the skin by smoking status reported at recruitment

From: Heterogeneous relationships of squamous and basal cell carcinomas of the skin with smoking: the UK Million Women Study and meta-analysis of prospective studies

  Squamous cell carcinoma Basal cell carcinoma
  N RR (95% CI) N RR (95% CI)
All cutaneous lesions
  Never-smoker 3509 1.00 26,996 1.00
  Ex-smoker 1857 1.00 (0.95–1.06) 14,312 0.99 (0.97–1.01)
  Current smoker 1333 1.22 (1.15–1.31) 7358 0.80 (0.78–0.82)
    <15 cigarettes/day 682 1.14 (1.05–1.24) 3976 0.80 (0.77–0.83)
    ≥15 cigarettes/day 651 1.34 (1.23–1.46) 3382 0.80 (0.77–0.83)
Lesions on the face
  Never-smoker 1097 1.00 9525 1.00
  Ex-smoker 534 0.93 (0.84–1.04) 5136 0.99 (0.96–1.03)
  Current smoker 317 0.93 (0.82–1.06) 3193 0.92 (0.88–0.96)
    <15 cigarettes/day 151 0.80 (0.68–0.95) 1662 0.90 (0.85–0.95)
    ≥15 cigarettes/day 166 1.09 (0.92–1.29) 1531 0.94 (0.89–0.99)
Lesions on the limbs
  Never-smoker 1437 1.00 2657 1.00
  Ex-smoker 798 1.05 (0.96–1.15) 1409 0.98 (0.92–1.05)
  Current smoker 663 1.55 (1.41–1.71) 652 0.72 (0.66–0.79)
    <15 cigarettes/day 358 1.50 (1.34–1.69) 362 0.74 (0.66–0.83)
    ≥15 cigarettes/day 305 1.61 (1.42–1.83) 290 0.70 (0.62–0.79)