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Table 4 The interaction effects between time and each of the three BCTs on MVPA. Means and 95% confidence intervals are displayed

From: Which behaviour change techniques are effective to promote physical activity and reduce sedentary behaviour in adults: a factorial randomized trial of an e- and m-health intervention

MVPA (min/week) Groups who did not receive the technique Groups who received the technique t-value (df) p-value Effect size
Action planning Pre-test 476.24 [384.13; 568.34] 558.72 [459.27; 658.17] −0.131 (221.88) 0.895 −10.73 [− 170.68; 149.23]
Post-test 574.11 [448.97; 699.26] 643.21 [494.29.93; 792.14]
Coping planning Pre-test 543.28 [449.25; 637.31] 487.30 [389.68; 584.93] 2.302 (218.424) 0.022 a 184.49 [27.41; 341.56]
Post-test 542.86 [416.61; 669.12] 671.93 [527.52; 816.36]
Self-monitoring Pre-test 524.62 [426.49; 622.75] 506.76 [413.38; 600.15] 2.735 (216.63) 0.007 b 217.45 [61.63; 373.34]
Post-test 510.88 [394.83; 626.94] 698.15 [548.44; 847.87]
  1. a p < 0.05, b p < 0.01 = significant differences in MVPA from pre-test to post-test between groups who did not receive the technique and groups who received the technique. 95% confidence intervals are shown in square brackets. Df = degrees of freedom. Effect size = absolute effect size in min/week