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Table 3 ADL or Activity Limitation Scales based on PCAF Activity Limitation Measures

From: Summarizing activity limitations in children with chronic illnesses living in the community: a measurement study of scales using supplemented interRAI items

Scale Properties Development Sample, 2009
(n = 2760)
Development Sample, 2009
(n = 2760)
Validation Sample, 2010
(n = 1765)
Validation Sample, 2010
(n = 1765)
  HC-PEDS
ADL Limitations Scale
HC-PEDS
Hands-on Needs Scale
HC-PEDS
ADL Limitations Scale
HC-PEDS
Hands-on Needs Scale
Distribution     
Mean 24.9 5.3 23.0 4.9
St. Deviation 15.3 3.3 14.3 3.1
Skewness 0.4 0.1 0.6 0.2
Kurtosis -1.1 -1.1 -0.8 -0.9
Median 21 5 19 4
Inter-quartile range 13-40 3-9 12-33 3-8
Range 0-50 0-10 0-50 0-10
Internal Consistency (unstandardized Cronbach's alpha)     
Full sample 0.93 0.90 0.93 0.89
Ages 4-8 0.92 0.88 0.91 0.86
Ages 9-12 0.93 0.90 0.93 0.89
Ages 13-16 0.94 0.91 0.93 0.90
Ages 17-20 0.93 0.90 0.94 0.88
Male 0.93 0.90 0.93 0.89
Female 0.93 0.90 0.92 0.89
Medical conditions only 0.93 0.89 0.92 0.88
Psychiatric, development or behavioral conditions only 0.79 0.76 0.77 0.73
Both medical and psychiatric, development or behavioral conditions. 0.93 0.90 0.93 0.89
Discriminant Validity (Pearson's r)     
Age -0.016
(p = 0.39)
-0.012
(p = 0.50)
-0.0174
(p = 0.46)
-0.025
(p = 0.28)
Concurrent Validity (Pearson's r)     
Additive IADL scale
(2009 sample α = 0.88; 2010 sample α = 0.87)
0.329 0.304 0.320 0.292
2-Person Assistance w/an ADL 0.464 0.444 0.538 0.504
Cognitive Scale
(2009 sample α = 0.82; 2010 sample α = 0.82)
0.355 0.309 0.368 0.315
Predictive Validity (Pearson's r)     
PCS hours authorized 0.455 0.435 0.436 0.424
Construct Validity (R 2 )     
OLS Model 0.65 0.59 0.71 0.64