Table 1

Baseline characteristics of participants by treatment group

CharacteristicSeleniumPlacebo
Participants randomized (no.)621629
Age (yrs) (mean ± SD)63.4 ± 10.263.0 ± 9.9
Gender (% male)7475
BMI (kg/m2) (mean ± SD)25.6 ± 3.925.5 ± 4.1
Smoking status (%)
 Never3430
 Former3940
 Current2730
Plasma selenium (ng/ml)
 Mean ± SD114.4 ± 22.6114.0 ± 21.5
 33rd centile105.6104.8
 50th centile113.6113.2
 66th centile122.4121.2