This Provisional PDF corresponds to the article as it appeared upon acceptance. Fully formatted PDF and full text (HTML) versions will be made available soon. Correction: Sports participation, perceived neighborhood safety, and individual cognitions: how do they interact? International Journal of Behavioral Nutrition and Physical Activity 2011, 8:114 doi:10.1186/1479-5868-8-114 Marielle A. Beenackers (m.beenackers@erasmusmc.nl) Carlijn B.M. Kamphuis (c.kamphuis@erasmusmc.nl) Alex Burdorf (a.burdorf@erasmusmc.nl) Johan P. Mackenbach (j.mackenbach@erasmusmc.nl) Frank J. van Lenthe (f.vanlenthe@erasmusmc.nl) ISSN 1479-5868 Article type Correction Submission date 17 October 2011 Acceptance date 20 October 2011 Publication date 20 October 2011 Article URL http://www.ijbnpa.org/content/8/1/114 This peer-reviewed article was published immediately upon acceptance. It can be downloaded, printed and distributed freely for any purposes (see copyright notice below). Articles in IJBNPA are listed in PubMed and archived at PubMed Central. For information about publishing your research in IJBNPA or any BioMed Central journal, go to http://www.ijbnpa.org/authors/instructions/ For information about other BioMed Central publications go to http://www.biomedcentral.com/ International Journal of Behavioral Nutrition and Physical Activity © 2011 Beenackers et al. ; licensee BioMed Central Ltd. This is an open access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/2.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. Correction: Sports participation, perceived neighborhood safety, and individual cognitions: how do they interact? Mariëlle A. Beenackers 1 *, Carlijn B.M. Kamphuis 1 , Alex Burdorf 1 , Johan P. Mackenbach 1 , Frank J. van Lenthe 1 1 Department of Public Health, Erasmus University Medical Center, PO Box 2040, 3000 CA Rotterdam, the Netherlands ∗ Corresponding author Email addresses: MAB: m.beenackers@erasmusmc.nl CBMK: c.kamphuis@erasmusmc.nl AB: a.burdorf@erasmusmc.nl JPM: j.mackenbach@erasmusmc.nl FJvL: f.vanlenthe@erasmusmc.nl Abstract: After publication of this work [Beenackers et al: Int J Behav Nutr Phys Act 2011, 8:76] it was realized that formula 3 and formula 4 in the Statistical Analysis section of the Methods were incorrectly listed. Since the formulas were correctly used in the analysis, this correction does not affect the results or conclusions of the paper. Correction After publication of this work [1] it was realized that formula 3 and formula 4 in the Statistical Analysis section of the Methods were incorrectly listed. Since the formulas were correctly used in the analysis, this correction does not affect the results or conclusions of the paper. The formulas should be: 61___1 β β β + = medium Zonlconditiona [3] 71___1 β β β + = low Zonlconditiona [4] So, to obtain the coefficient of the individual cognition (X) for the second category of perceived neighborhood safety (Z medium ), the coefficient of X (β 1 ) should be added to the coefficient of the interaction term XZ medium (β 6 ) (equation 3). Because of the logarithmic scale, the odds ratio of an interaction term can be interpreted as a multiplicative factor. To obtain the odds ratio of the individual cognition (X) for the second category of perceived neighborhood safety (Z medium ), the odds ratio of X (EXPβ 1 ) should be multiplied by to the odds ratio of the interaction term XZ medium (EXPβ 6 ). To obtain the coefficient of the individual cognition (X) for the last category of perceived neighborhood safety (Z low ), the coefficient of X (β 1 ) should be added to the coefficient of the interaction term XZ low (β 7 ) (equation 4). Again, to obtain the odds ratio of the individual cognition (X) for the last category of perceived neighborhood safety (Z low ), the odds ratio of X (EXPβ 1 ) should be multiplied by to the odds ratio of the interaction term XZ low (EXPβ 7 ). We regret any inconvenience that this may have caused. References 1. Beenackers MA, Kamphuis CBM, Burdorf A, Mackenbach JP, van Lenthe FJ: Sports participation, perceived neighborhood safety, and individual cognitions: how do they interact? Int J Behav Nutr Phys Act 2011, 8:76 . acceptance. Fully formatted PDF and full text (HTML) versions will be made available soon. Correction: Sports participation, perceived neighborhood safety, and individual cognitions: how do they interact? International. any inconvenience that this may have caused. References 1. Beenackers MA, Kamphuis CBM, Burdorf A, Mackenbach JP, van Lenthe FJ: Sports participation, perceived neighborhood safety, and individual. participation, perceived neighborhood safety, and individual cognitions: how do they interact? Mariëlle A. Beenackers 1 *, Carlijn B.M. Kamphuis 1 , Alex Burdorf 1 , Johan P. Mackenbach 1 , Frank