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Table 2 Number of participants submitting adequately filled spots and blood spots allowing at least one punch for analysis

From: Feasibility of self-sampled dried blood spot and saliva samples sent by mail in a population-based study

Number of blood spots Number of participants with adequately filled blood spots Number of participants with blood spots allowing at least one punch1
10 2,418 2,655
≥9 2,521 2,729
≥8 2,613 2,796
≥7 2,692 2,850
≥6 2,750 2,896
≥5 2,834 2,964
≥4 2,871 2,988
≥3 2,906 3,011
≥2 2,938 3,026
≥1 2,960 3,032
  1. 1a punch is 3.2 mm in diameter and would provide 3.1 μl of blood.