Table 3

Effect of treatment condition on hypothesized mediators (α)

Variable

Intention-to-treat analysis

Per-protocol analysis

α (SE)

95% CI

α (SE)

95% CI

Physical activity (steps/day)

229 (570)

-912 to 1369

24 (730)

-1452 to 1501

Portion size (PSF)

.06 (.07)

-.077 to .188

.06 (.09)

-.13 to .24

Total energy (kJ/day)

-449 (668)

-1786 to 888

-649 (847)

-2361 to 1063

Alcohol (gm/day)

-3.05 (2.31)

-7.67 to 1.58

-.549 (3.26)

-7.13 to 6.03

Total fat (gm/day)

-8.80 (7.73)

-24.27 to 6.66

-11.31 (9.86)

-31.24 to 8.62

Abbreviations: α = estimate of unstandardised regression coefficient effect of intervention on hypothesized mediators controlling for baseline; SE = standard error; 95% CI = 95% confidence interval

Lubans et al. International Journal of Behavioral Nutrition and Physical Activity 2009 6:76   doi:10.1186/1479-5868-6-76