Measuring Quality of Life in Residential Aged Care Using the EQ-5D-5L: A Cross-Sectional Study on the Impact of Cognition Level and Proxy Perspective on Interrater Agreement

Table 3

Agreement by the cognition subgroup.

	No cognitive impairment (n = 22)	Mild cognitive impairment (n = 27)	Moderate cognitive impairment (n = 14)
EQ-5D-5L scores
Self/proxy-proxy	0.70 (0.44, 0.85)	0.57 (0.32, 0.75)	0.40 (−0.04, 0.70)
Self/proxy-person	0.78 (0.55, 0.90)	0.68 (0.45, 0.83)	0.43 (−0.08, 0.76)
EQ VAS scores
Self/proxy-proxy	0.17 (−0.20, 0.50)	0.12 (−0.12, 0.35)	0.14 (−0.35, 0.57)
Self/proxy-person	0.27 (−0.08, 0.56)	0.16 (−0.11, 0.42)	0.33 (−0.14, 0.69)
EQ-5D-5L dimensions
Mobility
Self/proxy-proxy	0.52 (0.27, 0.77)	0.52 (0.27, 0.77)	0.35 (−0.01, 0.70)
Self/proxy-person	0.55 (0.28, 0.82)	0.65 (0.28, 0.82)	0.36 (0.01, 0.73)
Personal care
Self/proxy-proxy	0.55 (0.32, 0.77)	0.40 (0.32, 0.77)	0.12 (−0.10, 0.34)
Self/proxy-person	0.69 (0.46, 0.91)	0.61 (0.46, 0.91)	0.45 (0.19, 0.71)
Usual activities
Self/proxy-proxy	0.44 (0.24, 0.64)	0.27 (0.24, 0.64)	0.02 (−0.17, 0.20)
Self/proxy-person	0.44 (0.17, 0.71)	0.28 (0.17, 0.71)	0.42 (0.04, 0.79)
Pain/discomfort
Self/proxy-proxy	0.36 (0.08, 0.65)	0.22 (0.08, 0.65)	0.12 (−0.03, 0.50)
Self/proxy-person	0.30 (−0.01, 0.61)	0.28 (−0.01, 0.61)	0.19 (−0.17, 0.54)
Anxiety/depression
Self/proxy-proxy	0.13 (−0.13, 0.39)	0.22 (−0.13, 0.39)	0.11 (−0.37, 0.59)
Self/proxy-person	0.31 (−0.02, 0.64)	0.49 (−0.02, 0.64)	0.05 (−0.45, 0.55)

Values are concordance correlation coefficients (95% confidence intervals) for EQ-5D-5L scores and EQ VAS scores and equal spacing weighted kappas (95% confidence intervals) for the dimension-level analyses.