Table 2 Factor analysis using a rotated component matrix for perceived stress variables (factor loading >0.50 is cut-off point for inclusion)

Pressure and demands

I don’t have enough time

I feel under pressure from school demands

I feel helpless

I never feel really free

I feel under pressure from demands at home

I feel under pressure from my inner demands

I don’t feel rested after sleep

Activation/high tempo

I rush even if I don’t have to

I keep a high speed all the day

I eat rapidly even if I don’t have to

I do many things at the same time

I find it difficult to relax

Sleep problems

I sleep restlessly and shallow

I have difficulty falling asleep

I wake up early in the morning

I feel restless