Table 2.

Reliability of WD-FAB Scales in Two Samples

a. Physical Function	Working Age Adults							Adults with Work-Disability
	n	Mean (sd)	ICC (3,1)	95% CI		SEM	MDC90	n	Mean (sd)	ICC (3,1)	95% CI		SEM	MDC90
Changing & Maintaining Body Position	376	50.85 (9.17)	0.88	0.85	0.90	4.24	9.88	316	35.68 (8.56)	0.86	0.83	0.89	4.23	9.88
Upper Body Function	376	51.10 (8.11)	0.82	0.78	0.85	3.87	9.03	316	35.58 (7.70)	0.80	0.76	0.84	3.84	8.97
Upper Extremity Fine Motor	376	52.99 (5.92)	0.76	0.71	0.80	3.25	7.58	316	44.28 (7.85)	0.77	0.72	0.81	4.23	9.87
Whole Body Mobility	371*	50.31 (8.74)	0.89	0.86	0.91	4.25	9.92	297*	34.14 (7.03)	0.83	0.79	0.86	4.18	9.76
Wheelchair**								57	44.98 (8.50)	0.79	0.66	0.87	4.55	10.62

	Working Age Adults							Adults with Work-Disability
b. Behavioral Function	n	Mean (sd)	ICC (3,1)	95% CI		SEM	MDC90	n	Mean (sd)	ICC (3,1)	95% CI		SEM	MDC90
Self-Efficacy	376	48.50 (12.71)	0.66	0.60	0.72	6.47	15.11	316	41.27 (14.36)	0.80	0.76	0.84	5.66	13.21
Social Interactions	376	52.20 (11.0)	0.66	0.60	0.71	6.91	16.12	316	39.52 (10.24)	0.77	0.72	0.81	5.27	12.29
Behavioral Control	376	48.14 (11.5)	0.70	0.64	0.75	6.28	14.66	316	46.83 (12.20)	0.78	0.72	0.81	5.87	13.69
Mood and Emotions	376	49.52 (13.40)	0.68	0.62	0.73	6.97	16.27	316	39.51 (12.62)	0.78	0.74	0.82	5.42	12.65

^*Respondents who always used a Wheelchair did not complete Whole Body Mobility scale.

^**ICC for Wheelchair scale not calculated in the general US adult sample due to small sample size (n=8).