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Table 4 Repeated measure ANOVA of knowledge and attitude toward breastfeeding (scores) in adolescent mothers and grandmothers (n = 168)

From: Effectiveness of experiential learning with empowerment strategies and social support from grandmothers on breastfeeding among Thai adolescent mothers

Source of variation SS df MS F p - value
Adolescents
 Knowledge
  Between subjects
   Intervention 51,858.036 1 51,858.036 4.172 < 0.001
   Error 1019.151 82 12.429   
  Within subjects
   Time 700.310 1.309 534.888 130.536 < 0.001
   Intervention x time 611.770 1.309 467.262 114.032 < 0.001
   Error 439.921 107.360 4.098   
 Attitude
  Between subjects
   Intervention 756,152.444 1 756,152.444 9.735 <0.001
   Error 6369.222 82 77.673   
  Within subjects
   Time 825.294 1.779 463.851 61.612 <0.001
   Intervention x time 719.643 1.779 404.471 53.724 <0.001
   Error 1098.397 145.896 7.529   
Grandmothers
 Knowledge
  Between subjects
   Intervention 50,858.730 1 50,858.730 2.052 <0.001
   Error 2032.794 82 24.790   
  Within subjects
   Time 387.175 1.575 245.798 40.098 <0.001
   Intervention x time 496.381 1.575 315.128 51.407 <0.001
   Error 791.778 129.164 6.130   
 Attitude
  Between subjects
   Intervention 734,724.004 1 734,724.004 7.262 < 0.001
   Error 8296.325 82 101.175   
  Within subjects
   Time 616.056 2 308.028 40.827 < 0.001
   Intervention x time 487.960 2 243.980 32.338 < 0.001
   Error 1237.317 164 7.545   
  1. SS sum of squares, df degree of freedom, MS mean squares, F F-test