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Table 15 Comparison of record linkage and independent follow-up in Roberts et al. (1989)* [9, 10]

From: New views on the hypothesis of respiratory cancer risk from soluble nickel exposure; and reconsideration of this risk's historical sources in nickel refineries

Based on record linkage Based on independent follow-up  
  Dead Alive Totals
Dead 58 (92.10%) 0 (0.00%) 58
Alive 5 (7.90%) 862 (100.00%) 867
Totals 63 (100.00%) 862 (100.00%) 925**
  1. * Table two in Ref. [10]. ** 75 cases excluded: 31 not traced, 44 left country (of whom 13 known alive; 4 known dead).