Table S4.

Regression analyses testing a multiple mediator model with action control, self-efficacy, and received social support as mediators of physical activity adherence (N = 119)

B / SE / t / p / LL CI / UL CI
Intervention to mediator (a coefficients)
Action control
Intercept / -.389 / .111 / -3.52 / < .001 / -.608 / -.170
Intervention Group / .439 / .129 / 3.40 / < .001 / .183 / .695
Female / .347 / .128 / 2.72 / .008 / .094 / .600
Baseline action control / .214 / .058 / 3.68 / < .001 / .099 / .329
Baseline self-efficacy / .127 / .104 / 1.22 / .225 / -.079 / .333
Baseline received social support / .059 / .071 / 0.84 / .405 / -.081 / .199
Device wear-time / .069 / .048 / 1.43 / .155 / -.026 / .164
Self-efficacy
Intercept / -.439 / .118 / -3.73 / < .001 / -.673 / -.206
Intervention Group / .559 / .138 / 4.06 / < .001 / .286 / .832
Female / .330 / .136 / 2.42 / .017 / .060 / .600
Baseline action control / .068 / .062 / 1.09 / .279 / -.055 / .190
Baseline self-efficacy / .239 / .111 / 2.16 / .033 / .020 / .459
Baseline received social support / .089 / .075 / 1.18 / .241 / -.060 / .237
Device wear-time / .045 / .051 / 0.87 / .386 / -.057 / .146
Received social support
Intercept / -.402 / .130 / -3.10 / .003 / -.659 / -.145
Intervention Group / .523 / .152 / 3.45 / < .001 / .222 / .823
Female / .296 / .150 / 1.97 / .051 / -.002 / .593
Baseline action control / -.027 / -.068 / -0.40 / .690 / -.163 / .108
Baseline self-efficacy / -.002 / .122 / -0.02 / .987 / -.244 / .240
Baseline received social support / .343 / .083 / 4.15 / < .001 / .179 / .507
Device wear-time / .001 / .057 / 0.02 / .987 / -.111 / .113
Mediator to outcome (b and c’ path)
Intercept / .283 / .036 / 7.85 / < .001 / .212 / .354
Action control / .038 / .039 / 0.98 / .330 / -.039 / .115
Self-efficacy / -.017 / .035 / -0.49 / .625 / -.087 / .053
Received social support / .051 / .027 / 1.90 / .060 / -.002 / .104
Intervention Group / .087 / .043 / 2.03 / .045 / .002 / .171
Female / -.098 / .040 / -2.44 / .017 / -.177 / -.018
Baseline action control / -.001 / .019 / -0.06 / .95 / -.039 / .037
Baseline self-efficacy / .009 / .032 / 0.29 / .772 / -.054 / .073
Baseline received social support / -.022 / .023 / -0.96 / .340 / -.068 / .024
Device wear-time / .024 / .015 / 1.62 / .109 / -.005 / .053
Total effect (c path)
Intercept / .255 / .034 / 7.51 / < .001 / .188 / .322
Intervention Group / .120 / .040 / 3.03 / .003 / .042 / .199
Female / -.075 / .039 / -1.91 / .059 / -.153 / .003
Baseline action control / .005 / .017 / 0.25 / .804 / -.031 / .040
Baseline self-efficacy / .010 / .032 / 0.31 / .757 / -.053 / .073
Baseline received social support / -.004 / .022 / -0.17 / .863 / -.047 / .039
Device wear-time / .026 / .015 / 1.74 / .085 / -.004 / .055

Note.B = unstandardized regression coefficient, SE = standard error, LL CI = Lower Level Confidence Interval (95%), UL CI = Upper Level Confidence Interval (95%). Intervention Group is coded as 0 = control group and 1 = intervention group; Female is coded as 0 = male and 1 = female.