Do low control response rates always affect the findings? Assessments of smoking and obesity in two Australian case-control studies of cancer. Nirmala Pandeya, Gail M. Williams, Adèle C. Green, Penelope M. Webb and David C. Whiteman. Aust NZ J Public Health 2009 Vol 33. 3:312–19.

An incorrect formula was published in the diamond of Figure 1 for the article. The correct Figure 1 is shown below.

Figure 1.

Flow chart for imputing exposure data for non-participating controls.