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Table 1 Percentiles of the SCQOLS-15 QoL total score, initial model

From: Reference values for the short forms of the Singapore Caregiver Quality of Life Scale

Predictor

10th percentile

25th percentile

50th percentile

75th percentile

90th percentile

Coef

95% CI

Coef

95% CI

Coef

95% CI

Coef

95% CI

Coef

95% CI

Age per 10 years

−0.3

(−2.5, 1.9)

0.6

(−2.5)

0.5

(−0.8, 1.7)

1.4

(0.3, 2.5)

1.7*

(0.4, 3.0)

Sex

 Female

0

 

0

 

0

 

0

 

0

 

 Male

2.7

(−2.2, 7.7)

−0.5

(−4.4, 3.3)

0.5

(−2.2, 3.2)

0.0

(−2.2, 2.2)

−1.6

(−4.3, 1.1)

Ethnicity

 Chinese

0

 

0

 

0

 

0

 

0

 

 Malay

8.5

(−1.6, 18.6)

5.1

(−2.3, 12.5)

4.6

(−0.8, 10.0)

6.1

(1.0, 11.1)

5.5

(−0.1, 11.1)

 Indian

8.1

(−19.5, 35.6)

4.5

(−8.8, 17.8)

−0.9

(−8.2, 6.5)

0.8

(−7.3, 9.0)

−3.1

(−14.0, 11.5)

 Others

8.3

(16.8, 33.4)

6.5

(−4.5, 17.5)

2.6

(−5.6, 10.7)

0.9

(−9.1, 11.0)

1.0

(−11.9, 13.9)

Education level

 Tertiary

0

 

0

 

0

 

0

 

0

 

 Secondary

−4.3

(−9.6, 1.0)

−0.8

(−5.8, 4.3)

1.7

(−1.4, 4.9)

−0.8

(−3.6, 2.1)

0.1

(−3.2, 3.5)

 Primary/below

−1.3

(−9.7, 7.2)

−6.8

(−14.8, 1.3)

−2.8

(−7.3, 1.8)

−6.0*

(−10.1, −1.9)

−7.4*

(−12.5, −2.3)

Language

 English

0

 

0

 

0

 

0

 

0

 

 Chinese

7.5*

(2.4, 12.6)

1.1

(−3.7, 6.0)

2.1

(−0.9, 5.2)

1.5

(−1.2, 4.2)

2.1

(−1.2, 5.3)

Mode of survey administration

 Coef = 0 for each percentile

          

 Interviewer

−7.4

(−20.2, 5.4)

3.0

(−6.9, 13.0)

−4.5

(−9.6, 0.5)

−3.0

(−8.9, 2.9)

−2.1

(−7.6, 3.4)

Caregiver role

 0

0

 

0

 

0

 

0

 

0

 

 1

5.3

(−0.9, 11.6)

7.5

(1.7, 13.3)

5.5*

(1.4, 9.6)

3.6

(0.1, 7.2)

1.6

(−2.3, 5.4)

 2

14.2*

(8.4, 20.1)

13.5*

(8.3, 18.8)

9.4*

(5.5, 13.4)

5.6*

(1.8, 9.5)

4.3

(0.5, 8.0)

Patient’s performance status

 0 (Best)

0

 

0

 

0

 

0

 

0

 

 1

−0.8

(−9.4, 7.8)

−7.0

(−13.3, −0.6)

−4.3

(−8.3, −0.2)

−3.0

(−6.7, 0.8)

−2.0

(−6.8, 2.8)

 2

−8.3

(−20.1, 3.6)

−12.1*

(−20.1, −4.2)

−7.6

(−13.8, −1.4)

−4.8

(−9.4, −0.1)

−2.5

(−8.1, 3.1)

 3

−11.1

(−19.7, −2.5)

−15.3*

(−22.1, −8.5)

−9.7

(−14.3, −5.2)

−7.2*

(−11.0, −3.3)

−4.3

(−9.5, 0.9)

 4 (Worst)

−20.2*

(−29.8, −10.5)

−21.1*

(−29.6, −12.6)

−15.4

(−22.5, −8.3)

−7.1*

(−12.0, −2.2)

−7.6

(−13.7, −1.6)

Patient’s Diagnosis

 Colorectal cancer

0

 

0

 

0

 

0

 

0

 

 Breast cancer

6.8

(−3.5, 17.2)

4.7

(−2.9, 12.2)

4.2

(−0.8, 9.3)

−1.8

(−7.3, 3.7)

3.5

(−2.0, 8.9)

 Lung cancer

8.5

(1.9, 15.1)

2.3

(−4.3, 8.9)

1.3

(−2.9, 5.5)

−0.2

(−3.8, 3.4)

−1.4

(−5.1, 2.4)

 Others

8.2*

(2.1, 14.4)

3.8

(−1.4, 9.0)

1.2

(−2.2, 4.6)

−1.8

(−4.8, 1.1)

−1.4

(−5.0, 2.2)

Intercept

39.0*

(25.1, 52.9)

57.8*

(45.7, 69.9)

68.2*

(60.0, 76.4)

75.2*

(67.0, 83.4)

79.8*

(71.2, 88.4)

  1. *P-value < 0.01
  2. Abbreviations: Coef coefficient, CI confidence interval