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