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Table 6 Mediating effects of psychological need satisfaction on changes in objectively assessed daily step count

From: Short- and long-term effectiveness of a three-month individualized need-supportive physical activity counseling intervention at the workplace

 

Short-term (3 months)

Long-term (9 months)

 

α-path

β-path

αβ-path

α-path

β-path

αβ-path

Mediator variables

B (SE)

B (SE)

B (95% CI)

B (SE)

B (SE)

B (95% CI)

Need satisfaction

 Autonomy

 Weekday steps

0.24 (0.15)

620.97 (196.74)**

151.57 (-0.47–421.36)

0.37 (0.16)*

410.34 (221.57)

151.43 (13.64–419.73)*

 Average day steps

0.23 (0.15)

436.83 (176.81)*

100.83 (-3.33–76.86)

0.36 (0.16)*

538.01 (195.02)**

195.68 (29.42–510.41)*

 Competence

 Weekday steps

0.40 (0.17)*

626.11 (168.59)***

249.93 (76.80–541.99)*

0.34 (0.18)

514.84 (198.98)*

173.22 (20.86–454.86)*

 Average day steps

0.39 (0.17)*

498.37 (151.38)**

196.23 (50.97–433.38)*

0.34 (0.18)

576.19 (176.03)**

194.44 (25.47–447.12)*

 Relatedness

 Weekday steps

0.06 (0.19)

517.67 (151.04)***

28.85 (-145.65–240.08)

0.12 (0.21)

-63.58 (172.17)

-7.53 (-137.01–38.26)

 Average day steps

0.04 (0.19)

365.89 (136.62)

13.92 (-104.44–166.38)

0.08 (0.22)

88.76 (150.16)

7.08 (-33.93–134.05)

 Total needsa

 Weekday steps

0.23 (0.13)

942.42 (212.80)***

219.59 (3.51–508.61)*

0.27 (0.14)*

431.44 (261.95)

118.50 (9.61–366.94)*

 Average day steps

0.22 (0.14)

695.09 (192.17)***

153.53 (0.65–394.47)*

0.26 (0.14)

646.93 (230.33)**

168.41 (15.44–431.02)*

  1. α, estimate of the intervention effect on changes in the proposed mediators; β, estimate of the direct effect of changes in the proposed mediators on changes in daily step count while controlling for the intervention effect; αβ, estimate of the indirect effect of the intervention on changes in daily step count through the proposed mediators; 95% CI, 95% bias-corrected and accelerated confidence interval based on 2000 bootstrap resamples
  2. B Unstandardized regression coefficient, SE Standard error
  3. *p < .05, **p < .01, ***p < .001
  4. acomposite variable of autonomy, competence and relatedness need satisfaction