Erratum to: Eur J Epidemiol (2013) 28:939–944 DOI 10.1007/s10654-013-9861-4

In the original publication of the article there are some errors. Please see below the corrections.

Page 3, second column, ninth full paragraph:

“[A] little greater than 3 %” should read, “a little greater than 3 % (0.033).”

“[A] little less than 3 %” should read, “a little greater than 3 % (0.033) as well.”

“[A] two-sided p value of about 6 %” should read, “a two-sided p value of about 7 % (0.066).”