Sue Walker, National Centre for Health Information Research & Training, Queensland University of Technology
21 June 2010
We wish to clarify the selection of countries we included in our analysis of drowning deaths. To ensure statistical stability in the calculation of percentages, we included those countries with 20 or more reported unintentional drowning deaths, not more than 20 as indicated in the methodology.
Clarification of methodology
21 June 2010
We wish to clarify the selection of countries we included in our analysis of drowning deaths. To ensure statistical stability in the calculation of percentages, we included those countries with 20 or more reported unintentional drowning deaths, not more than 20 as indicated in the methodology.
Competing interests
The authors declare no competing interests.