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Table 1 Distribution of phase I (N s ) and II (n s ) samples in the 6 strata and sampling fractions expressed as percentages in parenthesis for Phase II

From: Crude incidence in two-phase designs in the presence of competing risks

  Treatment protocol  
  Standard Medium High  
  n s /N s (%) Total
No relapse 54/487 (11.1) 193/987 (19.6) 109/219 (49.8) 356/1693
Relapse 21/28 (75.0) 147/186 (79.0) 77/92 (83.7) 245/306
Total 75/515 340/1173 186/311 601/1999