Table 2

Adjusted mean serum selenium (μg/dl) concentration in control participants

Adjusted mean (SE)aPb
Gender0.30
 Male11.55 (0.07)
 Female11.75 (0.17)
Race0.99
 White11.58 (0.07)
 Black11.57 (0.32)
 Other/Unknown11.64 (0.37)
Exposure population0.06
 Asbestos11.31 (0.16)
 Heavy smokers11.72 (0.09)
Study center0.0001
 Baltimore9.89 (0.27)
 Irvine10.76 (0.22)
 New Haven11.20 (0.28)
 Portland11.96 (0.13)
 San Francisco10.99 (0.30)
 Seattle12.01 (0.10)
Blood draw smoking status0.0001
 Current11.34 (0.09)
 Former11.86 (0.09)
  • a Adjusted means from model including all variables with P < 0.1 in Table 1<$REFLINK> except years quit smoking for the heavy-smoker population. Adjusted means for blood draw year (P = 0.28) not given because this was a linear variable in the model.

  • b P for test of heterogeneity.