Validation of the Kidney Disease Quality of Life-Short Form: a cross-sectional study of a dialysis-targeted health measure in Singapore

Table 3 Factor loadings of the eight sub-scales of the KDQOL-SF

KDQOL-SF General Health Items	Role Physical	Physical Functioning	Emotional Well-being	General Health	Social Function	Pain	Role Emotional	Energy Fatigue
Vigorous activities		.663
Moderate activities		.756
Lifting carrying groceries		.682
Climbing several flights of stairs		.807
Climbing one flight of stairs		.686
Bending, kneeling, stooping		.534
Walking more than a mile		.731
Walking several blocks		.699
Walking one block		.537
Bathing or dressing yourself		.280
Due to physical health, did you...
Cut down amount of time on activities	.852
Accomplish less than what you would have liked	.872
Were limited in the kind of activities	.861
Have difficulty performing activities	.823
Body pain during last 4 weeks						.858
Did pain interfere your work						.794
How would you rate your health				.472
I get sick easier than other people				.669
I am as healthy as any one else				.769
I expect my health to get worse				.592
My health is excellent				.741
Have you been nervous person			.620
You felt so down that nothing could cheer you up			.737
Have you felt calm & peaceful			.218
Have you felt down hearted and blue			.748
Have you been a happy person			.215
Due to emotional problems...
You had to cut down amount of time on activities							.803
You accomplished less							.812
You could not do activities as carefully as usual							.749
To what extent have your physical health & emotional problems...
Interfered with your normal social life					.381
Interfered with visiting friends, relatives					.451
Did you feel full of pep								.774
Did you have a lot of energy								.694
Did you feel worn out								.339
Did you feel tired								.416

KDQOL-SF, kidney disease quality of life-short form
Verimax rotation with Kaiser normalization was used to control for certain influences (of items on the sub-scale) on the overall result