Table 3. Results from single mediation models (Odds Rations (OR) and regression coefficients (B), with 95% confidence intervals (95%CI)) examining potential intrapersonal mediators of leisure time physical activity (> = 150minutes/week)1 for cross-sectional data at baseline.
| Independent variable | Potential mediator | c-path OR (95%CI)2,8 |
a-path B (95%CI)3,8 |
b-path OR (95%CI)4,8 |
c'-path OR (95%CI)5,8 |
Mediated effect a*b (95%CI)6 |
Proportion mediated (a*b)/c 7 |
|---|---|---|---|---|---|---|---|
| Family social support | Enjoyment | 1.18 (1.11; 1.25) | 0.64 (0.43; 0.86) | 1.11 (1.09; 1.13) | 1.13 (1.06; 1.20) | 0.07 (0.04;0.09) | 37.5% |
| Outcome Expectations | 1.18 (1.11; 1.24) | 0.14 (0.07; 0.23) | 1.09 (1.05; 1.13) | 1.16 (1.10; 1,23) | 0.01 (0.00;0.02)) | 7.8% | |
| Self-Efficacy | 1.18 (1.11; 1.25) | 0.32 (0.20; 0.43) | 1.22 (1.19; 1.26) | 1.13 (1.06; 1.21) | 0.06 (0.04;0.09) | 35.9% | |
| Friend social support | Enjoyment | 1.25 (1.18; 1.33) | 0.66 (0.51; 0.82) | 1.11 (1.08; 1.13) | 1.20 (1.12; 1.28) | 0.07 (0.05;0.09) | 28.3% |
| Outcome Expectations | 1.25 (1.18; 1.32) | 0.15 (0.06; 0.24) | 1.09 (1.05; 1.13) | 1.24 (1.17; 1.32) | 0.01 (0.00;0.02) | 5.9% | |
| Self-Efficacy | 1.25 (1.18; 1.33) | 0.40 (0.30; 0.50) | 1.22 (1.18; 1.25) | 1.20 (1.13; 1.28) | 0.08 (0.05;0.10) | 31.5% |
Note. Values represented in bold are significant associations
1 The dependent variable leisure time physical activity was dichotomized at 150 minutes activity per week
2 c-path (total effect): is the association of social support from family or friends and leisure time physical activity analysed with a logistic regression analyses
3 a-path: the association between social support from family or friends and mediator analysed with a linear regression analyses
4 b-path: the association of mediator and leisure time physical activity analysed with a logistic regression analyses
5 c’-path (direct effect) is the association of social support from family or friends and leisure time physical activity adjusted for the mediator. This association is analysed with a logistic regression analyses.
6 Mediated effect (a*b) is the indirect effect of the independent variable on the outcome variable through the potential mediator.
7 Proportion mediated effect (a*b/c) using the adjusted c coefficient
8 All analyses are models adjusted for educational level (high, medium, low), living with children (yes, no), living area (rural vs urban) and robust standard errors were used to account for potential clustering within the neighbourhoods