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Table 3 Percentiles of QOL total score, final model

From: Reference values for and interpretation of the Singapore Caregiver Quality of Life Scale: a quantile regression approach

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)

Ethnicity

 Chinese

0

 

0

 

0

 

0

 

0

 

 Others

7.3

(0.6, 14.0)

6.1

(0.8, 11.5)

3.0

(0.2, 5.9)

3.3

(−1.5, 8.1)

3.9

(0.6, 7.1)

Education

 Secondary/above

0

 

0

 

0

 

0

 

0

 

 Primary/below

2.5

(−3.1, 8.0)

−1.1

(−6.7, 4.5)

− 3.2

(− 6.6, 0.2)

−4.7*

(−8.0, − 1.4)

−5.1

(− 9.1, − 1.0)

Caregiver role

5.7*

(2.2, 9.3)

6.4*

(4.0, 8.7)

3.1*

(1.0, 5.2)

1.8*

(0.7, 3.0)

0.6

(− 0.9, 2.2)

Performance status

−5.1*

(−7.7, − 2.6)

−4.7*

(−6.4, − 2.9)

−3.3*

(4.6, − 2.2)

−2.7*

(−3.3, − 2.1)

−2.2*

(−3.1, − 1.3)

Intercept

52.0*

(42.6, 61.5)

61.1*

(56.9, 65.2)

73.4*

(69.1, 77.6)

82.4*

(80.1, 84.6)

88.3*

(85.1, 91.4)

  1. *P < 0.01
  2. Example: The 10th percentile of an ethnic Indian caregiver with tertiary education who is the only family member (caregiver role = 0) giving care to a patient who has symptoms but is ambulatory (performance status = 1) is 52.0 + 7.3 + 0 + (0 × 5.7) + (1 × [− 5.1]) = 54.2