Numerical values of each variable in the loadings plot

VariableDescriptionPC1PC2PC3
V1Anxiety0.8250.169–0.500
V2Depression0.7470.549–0.212
V3Stress0.9400.213–0.184
V4Subjective quality of sleep0.847–0.1930.307
V5Sleep duration0.878–0.00237–0.254
V6Sleepiness and daytime dysfunction0.8610.107–0.134
V7Sleep latency0.794–0.5080.214
V8Sleep disorders and daytime dysfunction0.7600.4490.397
V9Use of hypnotics0.844–0.3880.252
V10Sleep efficiency0.734–0.6160.0716
V11Salivary cortisol0.1910.8640.446

Detailed explanations of each variable can be found in the original paper [1]. PC: principal component