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Table 4 Regression results for model 2: EQ-5D-3L based utility values QLQ-C30 questions as continuous variables

From: Evaluation of the performance of algorithms mapping EORTC QLQ-C30 onto the EQ-5D index in a metastatic colorectal cancer cost-effectiveness model

Variable

Coefficient (SD)

t-value

p-value

95% CI

Constant

1.340 (0.015)

86.755

< 0.001

[1.310, 1.370]

QLQ3

− 0.031 (0.006)

−5.553

< 0.001

[− 0.042, − 0.020]

QLQ5

− 0.077 (0.011)

−7.056

< 0.001

[− 0.098, − 0.055]

QLQ6

− 0.048 (0.005)

−9.660

< 0.001

[− 0.057, − 0.038]

QLQ9

− 0.053 (0.006)

−9.305

< 0.001

[− 0.064, − 0.042]

QLQ11

− 0.018 (0.005)

−3.686

< 0.001

[− 0.027, − 0.008]

QLQ19

− 0.021 (0.007)

− 3.150

0.002

[− 0.033, − 0.008]

QLQ22

− 0.021 (0.005)

−4.126

< 0.001

[− 0.031, − 0.011]

QLQ23

− 0.025 (0.006)

− 4.010

< 0.001

[− 0.038, − 0.013]

QLQ24

− 0.040 (0.007)

−6.113

< 0.001

[− 0.053, − 0.027]

QLQ26

− 0.026 (0.006)

−4.546

< 0.001

[− 0.037, − 0.015]

QLQ28

− 0.012 (0.006)

− 1.913

0.056

[− 0.025, 0.000]

  1. QLQ15 (vomiting) was removed as non-logical coefficient
  2. p-values result from a t-test