Table 3.

Rotated component matrix.

Items	Sleeplessness	Anxiety	Irritability	Hopelessness	Communalities
Insomnia_6	0.872				0.778
Insomnia_7	0.85				0.735
Insomnia_5	0.792				0.697
Insomnia_2	0.768				0.651
Insomnia_4	0.651				0.563
Insomnia__1	0.618				0.522
Insomnia_3	0.602				0.502
PS_1		0.835			0.711
PS_3		0.792			0.654
PS_2		0.737			0.589
PS_9		0.721			0.655
PS_5			0.84		0.697
PS_7			0.74		0.735
PS_8			0.705		0.544
PS_10				0.725	0.59
PS_6				0.517	0.423

PS, Perceived stress; INS, Insomnia; SUP, Stress-due-to-unpredictability; SOL, Stress-due-to-overload; SUC, Stress-due-to-uncontrollability.