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. 2014 Jul 23;16(7):e177. doi: 10.2196/jmir.3434

Table 2.

Independent t tests—intention-to-treat analysis.

Dependent variable Control group
(n=313)
Intervention group
(n=258)
Mean difference t 569 95% CI Cohen’s d
Physical activity






Frequency of doing exercise, Δ (t2–t1) 0.77 0.51 –0.26 3.17 –0.79, 0.27 –0.08

Improvements in physical activity frequency, mean 1.26 1.33 0.07 0.92 –0.09, 0.23 0.08

Improvements in physical activity regularity, mean 1.19 1.33 0.14 0.98 –0.03, 0.30 0.14

Improvements in physical activity in daily routine, mean 1.23 1.31 0.08 0.97 –0.08, 0.24 0.08
Eating behavior






Attention paid to a healthy diet, Δ (t2–t1) 1.10 1.20 0.11 2.34 –0.29, 0.51 0.04

Improvements in eating more healthy foods , mean 1.31 1.32 0.01 0.88 –0.14, 0.17 0.01

Improvements in eating less unhealthy foods, mean 1.32 1.39 0.08 0.95 –0.09, 0.24 0.08

Improvements in eating smaller portions, mean 1.08 1.10 0.03 0.89 –0.13, 0.18 0.03

Improvements in using less fat for cooking, mean 1.17 1.30 0.13 0.88 –0.03, 0.30 0.14