Authors | Year | Country | Target population | Outcome variable | Statistical analysis | R2* | Psychological concepts | SD | |
---|---|---|---|---|---|---|---|---|---|
N | Age ± SD | ||||||||
Barkoukis et al. | 2013a | Greece | 673 (750) | 25 ± 5.89 | (I) Intentions Lifetime never dopers | Hierarchical Regression | 41.2 % | SDT, AGT, sportspersonship, TPB, PM (part) | No |
 |  |  | 74 (750) |  | (II) Intentions Lifetime ever dopers | Hierarchical Regression | 78.2 % |  |  |
Barkoukis et al. | 2014 | Greece | 309 | 16.64 ± 1.15 | Susceptibility | Hierarchical Linear Regression | 42.2 % | AGT, TPB (part), DT | No |
Barkoukis et al. | 2015 | Greece | 60 | – | Intentions | Hierarchical Regression | 67 % | TPB |  |
Donahue et al. | 2006 | Canada | 1.201 | 16.34 ± 2.43 | Behaviour | SEM | – | SDT, sportspersonship, use | Yes |
Dunn and Thomas | 2012 | Australia | 1.684 | 22 ± 4.0 | Behaviour | Binary Logistic Regression Model | 30 %b | DT, PM (part) | No |
Gucciardi et al. | 2011 | Australia | 670 | 23.75 ± 8.49 | Susceptibility | SEM | 11 % | TPB (part), DT, morality, personality | No |
Hodge et al. | 2013 | New Zealand | 224 | 20.3 ± 3.1 | Susceptibility | SEM | 22 % | SDTc, MDE, TPB (parts) | No |
Jalleh et al. | 2014 | Australia | 1237 | 23 ± 7.8 | Behaviour | SEM | 13 % | TPB (part), DT, morality, personality | No |
Lazuras et al. | 2010 | Greece | 1075 | 25 ± 5.89 | Intentions | Hierarchical Regression analysis | 69.2 % | TPB, PM (part), DT | Yes |
Lazuras et al. | 2015 | Greece | 816 | 16.08 ± 1.50 | Intentions | Hierarchical Regression analysis | 57.2 % | TBP, SDT, AGT, sportperonship, norms, self-efficacy (PBC + situational temptation) | Yes |
Mazanov et al. | 2008 | UK | 757 | 18–23 | Behaviour | Logistic regression | – | TPB (part), experience | No |
Petroczi | 2007 | USA | 199 | 20.2 ± 2.15 | Behaviour | SEM | – | SOT (GOT), beliefs, TPB (part), experience | Yes |
Uvasczek et al. | 2011 | Hungary | 82 | 21.43 ± 2.82 | Behaviour | Multivariate regression model | – | Experience, PM (part), TPB (part) | No |
Whitaker et al. | 2014 | UK | 729 | 28.8 ± 10.1 | Susceptibility | Multivariate regression model | 54.4 % | PM, TPB (part), experience, expectancies | Yes |