Table 4.

Associations between serum β-carotene concentration and mortality by commonest cancer sitesa

Per 10 μg/dL unit increaseQ1 (<38)Q2 (38–65)Q3 (66–104)Q4 (≥105)
Cancer siteHR (95% CI)HR (95% CI)HR (95% CI)HR (95% CI)HR (95% CI)χ2P
All cancers (n = 415)1.00 (0.97–1.02)1 (ref.)0.98 (0.75–1.26)1.18 (0.90–1.53)1.03 (0.78–1.39)2.170.54
Lung (n = 219)0.99 (0.99–1.02)0.87 (0.60–1.24)0.96 (0.66–1.24)0.88 (0.59–1.31)0.810.85
Mesothelioma (n = 104)1.02 (0.96–1.05)1.38 (0.76–2.51)0.96 (0.56–1.64)1.23 (0.65–2.30)2.130.55
Colon (n = 17)0.69 (0.64–1.00)1.86 (0.44–7.80)0.72 (0.10–5.14)0.08 (0.01–1.01)5.350.15
  • aAdjusted for baseline age, years worked in insulation, and smoking status.