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Table 5 Associated factors on the agreement of self- and proxy ratings; partial regression coefficients (B) and standardised partial regression coefficients (β)

From: Inter-rater agreement of the Quality of Life-Alzheimer’s Disease (QoL-AD) self-rating and proxy rating scale: secondary analysis of RightTimePlaceCare data

   Model 1 (total sample: ILTC + HC)
r2adjusted = 0.13
Model 2 (subsample: HC setting)
r2adjusted = 0.08
Factor Measure/ variable B 95% CI ß 95% CI B 95% CI ß 95% CI
Intercept   1.09   −0.35   2.75   0.23  
People with dementia
 Behavioural and psychological symptoms of dementia NPI-Q 0.21 (0.13; 0.29) 0.20 (0.12; 0.28) 0.30 (0.15; 0.44) 0.29 (0.15; 0.42)
 Cognitive function S-MMSE −0.03 (−0.09; 0.03) − 0.03 (− 0.08; 0.03) 0.05 (− 0.03; 0.12) 0.04 (− 0.03; 0.11)
 Depression CSDD −0.02 (− 0.11; 0.07) −0.02 (− 0.10; 0.06) −0.09 (− 0.19; 0.01) −0.08 (− 0.17; 0.01)
 Functional status KATZ ADL −0.34 (− 0.55; − 0.13) −0.10 (− 0.16; − 0.04) −0.14 (− 0.40; 0.11) −0.04 (− 0.12; 0.03)
 Education Length of formal education 0.02 (−0.06; 0.11) 0.01 (−0.04; 0.07) 0.02 (− 0.08; 0.12) 0.01 (− 0.05; 0.08)
 Domestic environment Home care (reference: ILTC) 3.65 (2.88; 4.47) 0.58 (0.46; 0.70)     
Informal carers
 Caregiver burden ZBI      0.10 (0.06; 0.14) 0.26 (0.15; 0.36)
NPI-Q-D      −0.14 (−0.23; −0.04) −0.19 (− 0.33; − 0.05)
CRA/Lack of family support      −0.04 (−0.13; 0.06) −0.03 (− 0.10; 0.04)
 Quality of life GHQ-12      0.02 (−0.08; 0.12) 0.02 (−0.07; 0.11)
EQ-5D-3 L      0.30 (−1.75; 2.34) 0.01 (−0.07; 0.10)
EQ-5D VAS      −0.01 (− 0.04; 0.02) −0.03 (− 0.11; 0.06)
CRA/Impact on health      −0.09 (−0.25; 0.07) −0.06 (− 0.16; 0.04)
 Relationship to person with dementia Child (reference:
husband)
     −0.11 (−1.50; 1.28) − 0.02 (− 0.24; 0.20)
Wife      −0.30 (−1.91; 1.30) − 0.05 (− 0.30; 0.21)
Friend      −2.61 (−6.18; 0.97) −0.41 (−0.98; 0.15)
Other      −1.69 (−3.49; 0.07) −0.27 (−0.54; 0.01)
 Gender Female (reference: male)      −0.15 (−1.31; 1.01) − 0.02 (− 0.21; 0.16)
  1. Statistical significant coefficients are printed in bold font
  2. Value ranges of measures: see Additional file 1