Table 3

Relative risks for each variable and attributable risk for the final multivariable epidemiologic risk model for African-Americans

Risk factorRR* (95% CI)
Composite variable for smoking and COPD
 NS or pack-years<13.3 and no COPD1.00
 13.3≤pack-years<26.4 and no COPD and years since cessation<232.56 (1.69–3.90)
  Pack-years≥26.4 and no COPD and years since cessation≥3 and age at cessation<56 2.69 (1.47–4.92)
  Pack-years≥26.4 and no COPD and years since cessation<3 and age at cessation<566.06 (3.66–10.06)
  Pack-years≥26.4 and no COPD and age at cessation≥5610.1 (6.24–16.22)
  Pack-years<26.4 and COPD20.00 (5.62–71.11)
 13.3≤pack-years<26.4 and no COPD and years since cessation≥2321.38 (2.52–181.24)
  Pack-years≥26.4 and COPD34.29 (12.94–90.91)
Asbestos
 Unexposed1.00
 Exposed1.46 (1.04–2.04)
Dusts
 Unexposed1.00
 Exposed1.38 (0.97–1.96)
Hay fever
 No diagnosis1.00
 Diagnosis0.66 (0.43–1.01)
Attributable risk
 Males0.79
 Females0.59

Abbreviation: RR, relative risk.

  • *Age and sex adjusted.

  • Identified from tree model in Fig. 1.