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Table 1 Summary of the associations between friendship networks and physical activity and sedentary behavior across reviewed studies

From: Friendship networks and physical activity and sedentary behavior among youth: a systematized review

   Associations with physical activity Associations with sedentary behavior
   Positive Null Negative Positive Null Negative
Boys Close friends [15], [39]a, b, [31], [41] [15], [31]   [15] [15]  
  Friendship group [38]*      
  Popularity [15] [15], [47] [45]b   [15]  
  Friendship selection       
Girls Close friends [15], [39]a, b, [41], [42]*a [15], [39]a , [31], [41], [42]*   [15] [15]  
  Friendship group [42], [38]      
  Popularity [45]b [15], [47]   [15] [15]  
  Friendship selection       
Boys and girls Close friends [43]b, [40]b      
  Friendship group [14], [44] [44]    [14]  
  Popularity [45]b, [46] [40] [45]    [46]
  Friendship selection [43]b [40]b     
  1. Note. *Associations significant at p <.10. All other associations significant at p <.05.
  2. a = reciprocated nominations only.
  3. b = longitudinal analysis.
  4. Close friends: Physical activity or sedentary behavior of nominated best friend or close friends. Friendship group: Average physical activity or sedentary behavior of nominated friends. Popularity: Higher number of received friendship nominations or a higher measure of friendship rating/status (i.e., number of nominations received for preference to play with). Friendship selection: Individual choosing a friend based on similarities with his or her own physical activity or sedentary behavior.