Abstract
We read with interest the letter by Halvorsen et al. These authors demonstrated in Table 1 that the number needed to invite to prevent one melanoma death is inversely proportional to the mortality rate in the cohort. Whether or not a screening trial is feasible depends on this and many other factors, including the primary outcome, incidence, the screening test's accuracy, and contamination of the control group (in the case of a melanoma screening by opportunistic skin checks). This article is protected by copyright. All rights reserved.
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