Table 4

Total and stress independent associations between different variables and the depression score (p-value obtained from F-test and partial eta2 obtained from multiple analysis of covariance)

Variable
Model 1a
p-value/partial eta2
Model 2b
p-value/partial eta2

Full model
<0.001/0.333
<0.001/0.568
Perceived burdens: Course work
<0.001/0.035
<0.445/0.001
Perceived burdens: Isolation
<0.001/0.083
<0.001/0.047
Perceived burdens: Relationships
<0.001/0.022
<0.001/0.008
Perceived burdens: Future
<0.001/0.010
<0.001/0.009
Countries
<0.001/0.035
<0.001/0.027
Gender
<0.001/0.015
<0.157/0.001
Having a partner
0.001/0.007
0.023/0.003
Sufficiency of income
0.001/0.011
0.043/0.005
Performance at the university
<0.001/0.039
<0.001/0.017
Perceived stress
(not included in the model)
<0.001/0.351

a assuming that stress is only an intermediate effect between other variables in the model and depression, thus estimating the total effect of perceived burdens etc.

b including all predictors and perceived stress, thus estimating the effect of other variables controlling for stress

Mikolajczyk et al. Clinical Practice and Epidemiology in Mental Health 2008 4:19   doi:10.1186/1745-0179-4-19