Table 1

Development of current study population

Category Chrome platers Comparison workers (controls)
In post1-150 299299
Left employment1-150 10641081
Considered for prospective mortality study13631380
Removed from prospective mortality study:
 Untraced at NHSCR1-151 8215
 Member of HM Forces1-151 113
 Deceased1-151 10985
 Emigrated1-151 4268
 After reassessment of original study materials1-152 4236
Final study cohort10871163

  • ↵1-150 At time of factory visits carried out during the period 20 February 1969 to 31 May 1972.

  • ↵1-151 At the start of follow up on 1 June 1972.

  • ↵1-152 Carried out in 1981, see text.