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Journal of Patient-Reported Outcomes

Table 3 Percentiles of domain scores of the SCQOLS-15, final 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

Physical Well-being

 Ethnicity

  Chinese

0

 

0

 

0

 

0

 

0

 

  Indian

−16.7

(−73.7, 40.4)

0.0

(−26.7, 26.7)

0.0

(−13.3, 13.3)

0

(0, 0)

0

(0, 0)

  Malay and Others

16.7

(2.0, 31.4)

8.3*

(2.4, 14.3)

4.2

(−0.2, 8.6)

0

(0, 0)

0

(0, 0)

Caregiver role

16.7*

(12.4, 20.9)

8.3*

(2.9, 13.8)

6.4*

(3.7, 8.8)

0

(0, 0)

0

(0, 0)

Performance status

−4.2*

(−7.3, −1.1)

−8.3*

(−10.9, −5.8)

−4.2*

(−5.5, −2.8)

0

(0, 0)

0

(0, 0)

Intercept

37.5*

(27.0, 48.0)

65.8*

(65.8, 84.2)

87.5*

(82.4, 92.6)

100

(100, 100)

100

(100, 100)

Mental Well-being

 Education level

  Secondary/above

0

 

0

 

0

 

0

 

0

 

  Primary/below

−12.5*

(−18.7, −6.3)

−12.5*

(−21.2, −3.8)

−6.3

(−14.7, 2.2)

5.0

(−8.9, 18.9)

4.2

(−6.2, 14.5)

Caregiver role

2.1

(−1.7, 5.9)

4.2

(0.9, 7.4)

6.3*

(2.0, 10.5)

5.0

(0.9, 9.1)

4.2

(0.1, 8.2)

Performance status

−4.2*

(−6.5, −1.9)

−4.2*

(−6.0, −2.3)

−6.2*

(−8.3, −4.2)

−3.3

(−5.9, −0.8)

−4.2*

(−7.1, −1.3)

Intercept

25.0*

(15.7, 34.3)

37.5*

(30.7, 44.3)

52.1*

(44.9, 59.3)

66.7*

(59.4, 73.9)

83.3*

(75.6, 91.1)

Experience & Meaning

 Ethnicity

  Chinese

0

 

0

 

0

 

0

 

0

 

  Others

12.5

(−2.0, 27.0)

12.5*

(5.5, 19.5)

18.8*

(12.2, 25.3)

12.5*

(7.8, 17.2)

6.3*

(4.4, 8.1)

Intercept

31.3*

(27.0, 35.5)

50.0*

(44.7, 55.3)

62.5*

(56.5, 68.5)

81.3*

(79.7, 82.8)

93.8*

(91.9, 95.6)

Impact on Daily Life

Caregiver role

12.5*

(5.5, 19.5)

8.3*

(4.5, 12.1)

4.2*

(1.8, 6.6)

0

(0, 0)

0

(0, 0)

Performance status

−12.5*

(−16.9, −8.1)

−8.3*

(−11.0, −5.7)

−4.2*

(−5.0, −3.3)

0

(0, 0)

0

(0, 0)

Intercept

54.2*

(38.7, 69.6)

75.0*

(68.6, 81.4)

91.7*

(87.7, 95.7)

100

(100, 100)

100

(100, 100)

Financial Well-being

Age per 10years

0.0

(−5.8, 5.8)

1.8

(−1.9, 5.6)

4.6*

(1.8, 7.5)

0.0

(−1.9, 1.9)

0

(0, 0)

Education level

 Secondary/above

0

 

0

 

0

 

0

 

0

 

 Primary/below

−13.0

(−29.0, 3.7)

−17.0

(−31.0, −3.3)

−21.0*

(−33.0, −8.9)

−13.0

(−22.0, −2.9)

0

(0, 0)

Caregiver role

12.5

(3.7, 21.3)

17.2*

(12.0, 22.4)

13.9*

(8.9, 18.9)

0.0

(−4.2, 4.2)

0

(0, 0)

Performance status

−4.2

(−9.2, 0.9)

−5.6*

(−8.9, −2.3)

−1.9

(−4.6, 0.9)

0.0

(−0.9, 0.9)

0

(0, 0)

Intercept

16.7

(−21.0, 54.3)

34.1*

(12.6, 55.5)

42.6*

(23.8, 61.3)

100.0

(84.3, 100.0)

100

(100, 100)

  1. *P-value <0.01
  2. Abbreviations: Coef coefficient, CI confidence interval
  3. Example: The 10th percentile of the domain scores of a 50-year old, ethnic Malay caregiver with primary education who is the primary person (caregiver role = 1) giving care to a patient who has no symptoms (performance status = 0) are:
  4. Physical Well-being: 37.5 + 16.7 + (1 × 16.7) + (0 × [−4.2]) = 70.9
  5. Mental Well-being: 25.0 + (−12.5) + (1 × 2.1) + (0 × [−4.2]) = 14.6
  6. Experience & Meaning: 31.3 + 12.5 = 43.8
  7. Impact on Daily Life: 54.2 + (1 × 12.5 + (0 × [−12.5]) = 66.7
  8. Financial Well-being: 16.7 + (5 × 0.0) + (−13.0) + (1 × 12.5) + (0 × [−4.2]) = 16.2
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