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Table 4 Within and between study groups comparison at various data collection points

From: Randomised-controlled trial of a web-based dietary intervention for patients with type 2 diabetes: changes in health cognitions and glycemic control

  Timeline (month) Within study group Between study groups Interaction (Timeline*study group)
0 6th 12th F P ƞ2 F P ƞ2 F P ƞ2
Total DKAB score e-intervention 34.2 (5.2) 45.2 (8.0) 54.0 (8.7) 244.212 < 0.001** 0.790 26.818 < 0.001** 0.175 53.059 < 0.001** 0.296
Control 33.7 (5.5) 40.2 (9.9) 41.3 (7.7) 62.453 < 0.001** 0.676       
Knowledge score e-intervention 5.8 (2.1) 8.1 (2.2) 8.5 (2.0) 102.738 < 0.001** 0.612 12.027 < 0.001** 0.087 23.824 < 0.001** 0.159
Control 5.9 (1.7) 6.7 (1.6) 6.8 (1.5) 13.540 < 0.001** 0.182       
Attitude score e-intervention 23.7 (4.1) 30.8 (6.2) 38.2 (6.7) 221.521 < 0.001** 0.773 21.680 < 0.001** 0.147 38.478 < 0.001** 0.234
Control 23.0 (4.3) 27.3 (8.6) 29.1 (6.7) 38.318 < 0.001** 0.618       
Behaviour score e-intervention 4.7 (1.8) 6.3 (2.1) 7.2 (2.0) 103.180 < 0.001** 0.614 9.076 0.003* 0.067 27.205 < 0.001** 0.178
Control 4.7 (2.1) 5.2 (2.1) 5.4 (2.1) 6.168 0.004* 0.092       
DSOC score e-intervention 193.3 (14.6) 197.5 (16.7) 199.7 (18.2) 3.305 0.046* 0.049 7.552 0.007* 0.057 1.488 0.229 0.012
Control 191.2 (16.2) 191.2 (17.1) 191.5 (15.1) 0.008 0.992 0.000       
FBG (mmol/L) e-intervention 8.9 (3.9) 8.1 (2.7) 7.9 (2.5) 6.054 0.015* 0.085 0.899 0.345 0.007 0.591 0.453 0.005
Control 8.3 (2.9) 7.6 (2.6) 7.7 (2.6) 2.501 0.117 0.039       
HbA1c (%) e-intervention 9.1 (2.0) 8.7 (1.9) 8.5 (1.8) 8.334 0.004* 0.114 0.433 0.511 0.003 0.793 0.383 0.006
Control 8.9 (1.9) 8.3 (2.1) 8.4 (2.2) 10.934 0.001* 0.152       
  1. Data expressed as mean (SD); e-intervention (n = 66) and control (n = 62)
  2. *significant at p < 0.05; **significant at p < 0.001