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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

Predictor10thpercentile25thpercentile50thpercentile75thpercentile90thpercentile
Coef.(95% CI)Coef.(95% CI)Coef.(95% CI)Coef.(95% CI)Coef.(95% CI)
Ethnicity
 Chinese0 0 0 0 0 
 Others7.3(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/above0 0 0 0 0 
 Primary/below2.5(−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 role5.7*(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)
Intercept52.0*(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