Table 6

Effect of cigarette smoking on the total cancer predictivity of chromosomal aberrations in case-control data from Nordic countries (cancer incidence data) and Italy (cancer mortality data)

CountryCA frequencyCigarette smoking statusa
NonsmokerSmokerTotal
nca + ncobORcnca + ncoORcORadjusted (95% CI)d
Nordic countriesLowe15 + 851.008 + 311.001.00
Medium13 + 731.016 + 590.390.88 (0.46–1.67)
High18 + 482.1325 + 541.792.33 (1.28–4.24)
ItalyLowe2 + 291.008 + 461.001.00
Medium3 + 281.5514 + 461.751.64 (0.76–3.56)
High6 + 283.1119 + 382.882.54 (1.18–5.54)
  • a In the 5 years before CA test.

  • b Number of cases + number of controls.

  • c Crude OR.

  • d OR adjusted for matching factors and occupational exposure.

  • e Reference category.