Table 2

Factor analysis using a rotated component matrix for perceived stress variables (factor loading >0.50 is cut-off point for inclusion)
Perceived stress variables Factor loading
Factor 1 Factor 2 Factor 3
Pressure and demands Eigenvalue 5.97 Cronbach’s alpha 0.83
I don’t have enough time 0.754
I feel under pressure from school demands 0.698
I feel helpless 0.671
I never feel really free 0.641
I feel under pressure from demands at home 0.563
I feel under pressure from my inner demands 0.536
I don’t feel rested after sleep 0.531
Activation/high tempo Eigenvalue 1.41 Cronbach’s alpha 0.72
I rush even if I don’t have to 0.721
I keep a high speed all the day 0.700
I eat rapidly even if I don’t have to 0.576
I do many things at the same time 0.551
I find it difficult to relax 0.533
Sleep problems Eigenvalue 1.04 Cronbach’s alpha 0.82
I sleep restlessly and shallow 0.763
I have difficulty falling asleep 0.739
I wake up early in the morning 0.606
I feel restless 0.524

Selected factors with an eigenvalue greater than 1 explained 52.7% of the variance.

Wiklund et al.

Wiklund et al. BMC Public Health 2012 12:993   doi:10.1186/1471-2458-12-993

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