Table 2.

Intervention completion by motivation and self-efficacy

VariableIntervention completers, mean (SD)Intervention noncompleters, mean (SD)t value
Intrinsic motivationc26.8 (3.4)25.9 (3.6)−2.66a
Extrinsic motivationd16.4 (4.7)15.4 (4.8)−2.28b
Diet self-efficacye33.0 (8.1)31.9 (9.2)−1.40
Physical activity self-efficacyf23.6 (5.2)22.5 (5.2)−2.15b
  • aP < 0.01.

  • bP < 0.05.

  • cCronbach α = 0.92.

  • dCronbach α = 0.92.

  • eCronbach α = 0.78.

  • fCronbach α = 0.80.