Table 2.

Descriptive and Reliability Data in Young Adults, Older Adults, and Patients with Chronic Kidney Disease (CKD)

	Sample A: Young Adults (n=128)			Sample B: Older Adults (n=203)			Sample C: CKD Patients (n=55)
JLO Form	M (SD)	Cronbach's Alpha	Mean Inter-item Correlation	M (SD)	Cronbach's Alpha	Mean Inter-item Correlation	M (SD)	Cronbach's Alpha	Mean Inter-item Correlation
Full Form	23.8 (4.9)	.84	.15	24.3 (4.3)	.81	.13	18.7 (5.4)	.81	.13
1–10	8.9 (1.7)	.74	.24	9.1 (1.3)	.60	.16	7.4 (2.0)	.64	.16
1–20	17.2 (2.9)	.77	.16	17.5 (2.5)	.70	.13	14.1 (3.6)	.75	.14
11–30	14.8 (3.5)	.75	.13	15.2 (3.5)	.77	.14	11.3 (3.9)	.76	.14
Form "Q"	11.9 (2.5)	.67	.13	12.3 (2.2)	.65	.12	9.5 (2.8)	.66	.11
Form "S"	11.9 (2.7)	.74	.17	12.0 (2.4)	.69	.13	9.2 (3.0)	.72	.15
Odd	11.9 (2.8)	.76	.18	12.1 (2.4)	.68	.12	9.3 (2.9)	.69	.14
Even	11.8 (2.4)	.65	.12	12.3 (2.3)	.65	.12	9.3 (2.8)	.65	.11
IRT-based (basal/ceiling of 6)	24.2 (5.1)	N/A	N/A	24.7 (4.5)	N/A	N/A	18.6 (6.3)	N/A	N/A
IRT-based (basal/ceiling of 3)	23.9 (5.9)	N/A	N/A	24.3 (5.3)	N/A	N/A	18.3 (6.9)	N/A	N/A