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Table 4 Mediation analyses for associations between parental and peer variables and MVPA on weekdays and weekend days

From: Exploring associations between parental and peer variables, personal variables and physical activity among adolescents: a mediation analysis

MVPA on weekdays

 

α, SE

β, SE

αβ, SE

% mediated

(95%CI)

(95%CI)

(95%CI)

Parental logistic support for PA

Potential mediators

    

Self-efficacy

0.175, 0.054

0.032, 0.028

0.006, 0.005

-

(0.069;0.281)**

(−0.023;0.087)

(−0.005;0.016)

Internal barriers

−0.044, 0.010

−0.341, 0.153

0.015, 0.008

42.9%

(−0.064;-0.024)***

(−0.641;-0.041)*

(0.000;0.030)*

External barriers

−0.040, 0.009

−0.249, 0.157

0.010, 0.007

-

(−0.058;-0.022)***

(−0.557;0.059)

(−0.003;0.023)

Parental control of PA

Potential mediators

    

Self-efficacy

−0.367, 0.099

0.027, 0.028

−0.010, 0.011

-

(−0.561;-0.173)***

(−0.028;0.082)

(−0.031;0.011)

Internal barriers

0.054, 0.018

−0.301, 0.145

−0.016, 0.010

29.0%

(0.019;0.089)**

(−0.585;-0.017)*

(−0.035;0.002)

External barriers

0.020, 0.018

−0.284, 0.149

−0.006, 0.006

-

(−0.015;0.055)

(−0.576;0.008)

(−0.017;0.006)

Parental concern about PA

Potential mediators

    

Self-efficacy

−1.099,0.291

0.023, 0.028

−0.025, 0.031

-

(−1.669;-0.529)***

(−0.032;0.078)

(−0.087;0.036)

Internal barriers

0.225, 0.053

−0.280, 0.153

−0.063, 0.037

35.0%

(0.121;0.329)***

(−0.580;0.020)

(−0.136;0.010)

External barriers

0.153, 0.053

−0.237, 0.156

−0.036, 0.027

-

(0.038;0.288)**

(−0.543;0.069)

(−0.089;0.017)

Peer interest in PA

Potential mediators

    

Self-efficacy

0.163,0.064

0.029, 0.028

0.005, 0.005

-

(0.038;0.288)*

(−0.026;0.084)

(−0.005;0.014)

Internal barriers

−0.037, 0.012

−0.311, 0.143

0.012, 0.006

32.0%

(−0.061;-0.012)**

(−0.591;-0.031)*

(−0.001;0.024)

External barriers

−0.029, 0.011

−0.268, 0.152

0.008, 0.005

-

(−0.051;-0.007)**

(−0.566;0.030)

(−0.003;0.018)

MVPA on weekend days

 

α (SE)

β (SE)

αβ (SE)

% mediated

(95%CI)

(95%CI)

(95%CI)

Parental co-participation in PA

Potential mediators

    

Self-efficacy

0.042, 0.067

0.054, 0.056

0.002, 0.004

-

(−0.089;0.173)

(−0.056;0.164)

(−0.006;0.011)

Internal barriers

−0.009, 0.012

−0.729, 0.306

0.007, 0.009

-

(−0.033;0.015)

(−1.329;-0.129)*

(−0.011;0.025)

External barriers

−0.009, 0.012

0.702, 0.324

0.006, 0.009

-

(−0.033;0.015)

(−1.337;-0.067)*

(−0.011;0.024)

Parental logistic support for PA

Potential mediators

    

Self-efficacy

0.175, 0.054

0.025, 0.059

0.004, 0.010

-

(0.069;0.281)**

(−0.091;0.141)

(−0.016;0.025)

Internal barriers

−0.045, 0.010

−0.585, 0.333

0.026, 0.016

-

(−0.065;-0.025)***

(−1.238;0.068)

(−0.005;0.058)

External barriers

−0.040, 0.010

−0.545, 0.347

0.019, 0.013

-

(−0.058;-0.021)***

(−1.225;0.135)

(−0.006;0.044)

Parental praise of PA

Potential mediators

    

Self-efficacy

0.103, 0.051

0.039, 0.058

0.004, 0.006

-

(0.003;0.203)*

(−0.075;0.153)

(−0.008;0.016)

Internal barriers

−0.031, 0.010

−0.585, 0.325

0.018, 0.012

-

(−0.051;-0.011)**

(−1.238;0.068)

(−0.005;0.041)

External barriers

−0.020, 0.009

−0.640, 0.330

0.013, 0.009

-

(−0.038;-0.002)*

(−1.287;0.007)

(−0.004;0.030)

  1. Analyses were adjusted for adolescents’ sex, maternal education, total accelerometer wear-time and days worn; β-path was adjusted for the independent variables; MVPA, moderate- to vigorous physical activity; SE, standard error; CI, confidence interval; p < 0.1 (indicated in italic); *p < 0.05 (indicated in bold); **p < 0.01 (indicated in bold); ***p < 0.001 (indicated in bold).