Erratum to: Sports participation, perceived neighborhood safety, and individual cognitions: how do they interact?

  • Mariëlle A Beenackers1Email author,

    Affiliated with

    • Carlijn BM Kamphuis1,

      Affiliated with

      • Alex Burdorf1,

        Affiliated with

        • Johan P Mackenbach1 and

          Affiliated with

          • Frank J van Lenthe1

            Affiliated with

            International Journal of Behavioral Nutrition and Physical Activity20118:114

            DOI: 10.1186/1479-5868-8-114

            Received: 17 October 2011

            Accepted: 20 October 2011

            Published: 20 October 2011

            The original article was published in International Journal of Behavioral Nutrition and Physical Activity 2011 8:76

            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:
            β 1 _ c o n d i t i o n a l _ o n _ Z m e d i u m = β 1 + β 6 http://static-content.springer.com/image/art%3A10.1186%2F1479-5868-8-114/MediaObjects/12966_2011_Article_507_Equ1_HTML.gif
            (3)
            β 1 _ c o n d i t i o n a l _ o n _ Z l o w = β 1 + β 7 http://static-content.springer.com/image/art%3A10.1186%2F1479-5868-8-114/MediaObjects/12966_2011_Article_507_Equ2_HTML.gif
            (4)

            So, to obtain the coefficient of the individual cognition (X) for the second category of perceived neighborhood safety (Zmedium), the coefficient of X (β1) should be added to the coefficient of the interaction term XZmedium6) (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 (Zmedium), the odds ratio of X (EXPβ1) should be multiplied by to the odds ratio of the interaction term XZmedium (EXPβ6).

            To obtain the coefficient of the individual cognition (X) for the last category of perceived neighborhood safety (Zlow), the coefficient of X (β1) should be added to the coefficient of the interaction term XZlow7) (equation 4). Again, to obtain the odds ratio of the individual cognition (X) for the last category of perceived neighborhood safety (Zlow), the odds ratio of X (EXPβ1) should be multiplied by to the odds ratio of the interaction term XZlow (EXPβ7).

            We regret any inconvenience that this may have caused.

            Notes

            Authors’ Affiliations

            (1)
            Department of Public Health, Erasmus University Medical Center

            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: 76-10.1186/1479-5868-8-76.View Article

            Copyright

            © Beenackers et al; licensee BioMed Central Ltd. 2011

            This article is published under license to 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.

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