Additional file 1.
Detailed characteristics of the original studies in the systematic review. Description: This table contains more detailed information about following study characteristics: sample size, mean age participants, % females, sampling methods, country, design, dependent and independent variables and results (associations). (PDF 1016 kb)
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Van Holle et al. BMC Public Health 2012 12:807 doi:10.1186/1471-2458-12-807