Examining interrater agreement between self-report and proxy-report responses for the quality of life-aged care consumers (QOL-ACC) instrument

Journal of Patient-Reported Outcomes

Table 4 Agreement between proxy-reported and self-reported QOL-ACC dimension-level responses for the full sample and by cognition subgroup. Values are quadratic weighted kappa statistics (95% confidence intervals)

QOL-ACC dimension & rater pairing	Full sample (n = 63)	No impairment (n = 22)	Mild-to-moderate impairment (n = 41)
Mobility
self-report/proxy-proxy	0.583 (0.32, 0.76)	0.522 (0.07, 0.78)	0.607 (0.25, 0.81)
self-report/proxy-person	0.544 (0.29, 0.74)	0.410 (0.177, 0.78)	0.603 (0.29, 0.81)
Pain management
self-report/proxy-proxy	0.202 (-0.06, 0.47)	0.366 (0.12, 0.64)	0.092 (-0.23, 0.44)
self-report/proxy-person	0.078 (-0.19, 0.35)	0.215 (-0.03, 0.47)	-0.002 (-0.37, 0.41)
Emotional well-being
self-report/proxy-proxy	0.288 (0.09, 0.48)	0.303 (0.05, 0.58)	0.280 (0.00, 0.52)
self-report/proxy-person	0.413 (0.17, 0.59)	0.389 (0.11, 0.65)	0.424 (0.10, 0.65)
Independence
self-report/proxy-proxy	0.195 (-0.02, 0.48)	0.261 (-0.04, 0.62)	0.148 (-0.17, 0.46)
self-report/proxy-person	0.288 (0.05, 0.51)	0.321 (0.01, 0.67)	0.265 (-0.04, 0.60)
Social connections
self-report/proxy-proxy	0.195 (-0.03, 0.464)	0.261 (-0.04, 0.63)	0.148 (-0.16, 0.49)
self-report/proxy-person	0.288 (0.05, 0.53)	0.321 (0.02, 0.66)	0.265 (-0.04, 0.62)
Activities
self-report/proxy-proxy	0.144 (-0.08, 0.36)	0.351 (-0.08, 0.78)	0.072 (-0.16, 0.28)
self-report/proxy-person	0.068 (-0.14, 0.28)	0.232 (-0.19, 0.60)	0.003 (-0.25, 0.29)