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Table 4 BMI and Social Cognitive Theory outcomes

From: Print versus a culturally-relevant Facebook and text message delivered intervention to promote physical activity in African American women: a randomized pilot trial

   Baseline 8-Weeks     
Variable Rangea M (SD) Median M (SD) Median Baseline to 8-week change Unadjusted baseline to 8-week change Adjusted between group difference in baseline to 8 week change Effect sized
Mean (SD) P b P c η 2
BMI (weight [kg]/height [m 2 ])          
Facebook (n = 14) 19.90-55.00 30.01 (7.58) 28.05 29.95 (7.31) 27.60 -.06 (.82) .866 .502 .082
Print (n = 15)   32.29 (8.34) 30.20 32.62 (8.21) 30.90 .32 (1.76) .718   
Outcome expectations          
Facebook (n = 14) 1-5 4.31 (0.40) 4.39 4.46 (.36) 4.44 .15 (.32) .114 .001 .392
Print (n = 15)   3.94 (.55) 4.00 4.200 (4.29) 4.11 .26 (.49) .081   
Self-regulation          
Facebook (n = 14) 1-5 1.69 (.56) 1.55 3.21 (.47) 3.22 1.51 (.63) <.001 <.001 .575
Print (n = 15)   1.76 (.38) 1.80 2.73 (.45) 2.50 .96 (.69) <.001   
Self-efficacy          
Facebook (n = 14) 1-5 3.58 (.61) 3.57 3.73 (.72) 3.57 1.14 (.49) .385 .280 .092
Print (n = 15)   3.53 (.63) 3.38 3.76 (.74) 3.64 .23 (.71) .246   
Social support from friends          
Facebook (n = 14) 8-40 18.62 (7.81) 20.00 23.85 (7.66) 26.66 5.23 (9.77) .099 .366 .080
Print (n = 15)   17.57 (8.94) 15.50 19.57 (11.29) 16.00 3.47 (8.90) .403   
Social support from family          
Facebook (n = 14) 10-50 20.64 (4.60) 20.00 27.00 (8.29) 24.50 3.36 (9.44) .030 .044 .262
Print (n = 15)   17.78 (5.69) 16.00 20.38 (9.59) 17.00 2.71 (10.23) .671   
  1. aBMI range is the observed minimum and maximum for entire sample; questionnaire range scores are the potential range for each respective measure (the higher the score the more favorable the outcome).
  2. bWilcoxon signed rank for baseline to 8 week change.
  3. cMann–Whitney p-value examining the difference in baseline to 8-week change values between groups. BMI = Body Mass Index.
  4. dEta squared effect size estimates for ANCOVA models controlling from baseline values.