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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