Variable | Author | Expected relationship |
Age | Dale et al. (2015), Shehnaz et al. (2014) |
|
Binge drinking | Skarstein et al. (2014) |
|
Bullied | Skarstein et al. (2016) |
|
Coffee consumption | Skarstein et.al. (2014) |
|
Conflict with parents | Skarstein et al. (2016) |
|
Physical pain | Dale et al. (2015), Hansen et al. (2008), Hasseleid et al. (2017), Levin et al. (2015), Skarstein et al. (2016), Shehnaz et al. (2014), Skarstein et al.(2014), Turunen et al. (2005) |
|
Educational ambition | Skarstein et al. (2014) |
|
Female gender | Bäckryd (2018), Dale et al. (2015), Hasseleid et al. (2017), Shehnaz et al. (2014) |
|
Health | Du and Knopf (2009), Levin et al. (2015) |
|
Household income | Du and Knopf (2009) |
|
Maternal education | Du and Knopf (2009), Shehnaz et al. (2014) |
|
Mood | Turunen et al. (2005) |
|
Need to feel successful | Skarstein et al. (2016) |
|
Parental usage | Andersen et al. (2012), Hasseleid et al. (2017), Jensen (2014) |
|
Physical activity | Dale et al. (2015) |
|
Self-esteem | Skarstein et al. (2014) |
|
Shirking school | Skarstein et al. (2014) |
|
Sleep problems | Skarstein et al. (2014) |
|
Spare-time work | Skarstein et al. (2014) |
|
Stress | Hansen et al. (2008), Skarstein et al. (2016) |
|
Unemployment | Turunen et al. (2005) |
|