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Correction: Sports participation, perceived neighborhood safety, and individual

cognitions: how do they interact?

International Journal of Behavioral Nutrition and Physical Activity 2011,

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)

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International Journal of

Behavioral Nutrition and

Physical Activity

© 2011 Beenackers et al ; licensee BioMed Central Ltd.

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Correction: Sports participation, perceived neighborhood safety, and individual cognitions: how do they

interact?

Mariëlle A Beenackers1*, Carlijn B.M Kamphuis1, Alex Burdorf1, Johan P Mackenbach1, Frank J van Lenthe1

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:

6 1 _

_

medium Z on l

7 1 _

_

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 XZmedium (β6) (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 XZlow (β7) (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

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