Table 1

Toenail selenium levels (μg/g) in bladder cancer cases according to sex and time between baseline and bladder cancer diagnosis; Netherlands Cohort Study (1986–1992)

CasesaNo. of subjectsToenail selenium level (μg/g)
MeanSDPb
Sex
 Men3720.5360.215Reference
 Women590.5680.1220.02
Year of follow-upc
 1470.5180.0910.04
 2610.5230.2630.21
 3740.5460.1280.50
 4750.5440.1550.90
 5700.5680.1540.63
 6840.5900.721Reference
 7200.5950.123Reference
  • a Mean ± SD selenium levels in subcohort members were 0.547 ± 0.126 μg/g for men (n = 1211) and 0.575 ± 0.109 μg/g for women (n = 1248).

  • b Partial t tests between strata and reference group, based on In-transformed toenail selenium levels.

  • c Presented results per year of follow-up were adjusted for sex through linear regression analysis.