Table 3.

Measures of Reliability and Responsiveness for the ADLS, LEFS and WOMAC at 2, 6 and 12 Months

		ICC (95% CI)	SEM +	SEM ++	MDC95% +	MDC95% ++	MDC90% +	MDC90% ++	Rho	AUC(95% CI)	GRI(95%CI)
0–2 months	ADLS	.93 (.85, .97)	4.5	4.5	12.5	12.5	10.5	10.5	−.41*	.71 (.63, .80)	.81 (.49, 1.14)
	LEFS	.81 (.63, .91)	6.9	5.6	19.2	15.4	16.1	12.9	−.30*	.69 (.61, .78)	.70 (.38, 1.03)
	WOMAC	.90 (.76, .95)	5.1	4.8	14.1	13.4	11.8	11.2	−.33*	.70 (.62, .79)	1.0 (.64, 1.35)
0–6 months	ADLS	.87 (.75, .94)	6.2	6.2	17.2	17.2	14.4	14.4	−.52*	.74 (.66, .82)	.73 (.40, 1.06)
	LEFS	.85 (.71, .93)	6.4	5.1	17.6	14.1	14.7	11.8	−.46*	.71 (.62, .79)	.61 (.31, .91)
	WOMAC	.88 (.76, .94)	5.4	5.8	15.0	16.1	12.6	13.4	−.51*	.72 (.64, .80)	.85 (.52, 1.20)
0–12 months	ADLS	.80 (.61, .90)	7.6	7.6	21.0	21.0	17.6	17.6	−.53*	.74 (.66, .82)	.85 (.54, 1.15)
	LEFS	.75 (.53, .88)	8.2	6.5	22.6	18.1	19.0	15.2	−.47*	.72 (.63, .80)	.69 (.40, .99)
	WOMAC	.81 (.63, .91)	6.7	7.2	18.5	20.0	15.5	16.7	−.44*	.70 (.61, .79)	.85 (.53, 1.16)

⁺Values reported are transformed scores with ranges from 0 to 100, where higher scores represent better function.

⁺⁺ Values are reported in outcome measure original scale where higher scores represent better function for the ADLS and LEFS, and lower scores represent better function for the WOMAC.

^*correlation significant at the 0.01 level

SEM=S_x*√(1−r_xx), where S_x=standard deviation at baseline of the measurement tool from the total sample and r_xx=reliability coefficient for that measurement tool

MDC 95%=SEM_x*1.96*√(2),

MDC 90%=SEM_x*1.64*√(2)

Rho=Spearman’s correlation coefficient between each outcome measure and the GRC

AUC= probability that the outcome measure would be able to distinguish an individual who perceives them self to be improved from an individual who does not

GRI= mean change of those improved/standard deviation of change of those not improved