Patient self-appraisal of change and minimal clinically important difference on the European organization for the research and treatment of cancer quality of life questionnaire core 30 before and during cancer therapy

Table 4 The relationship between the EORTC QLQ-C30 change scores and the SSQ rating categories during cancer treatment

QLQ-C30 Domain	Clinical service	Intercept		Slope-improvement		Slope-deterioration
QLQ-C30 Domain	Clinical service	Est.	p-value	Est.	p-value	Est.	p-value
Physical function	SCT	−9.21	0	1.72	0.36	5.70	<.0001
Physical function	MED/RAD	−1.30	0.19	1.11	0.14	7.15	<.0001
Emotional function	SCT	4.09	0.0074	2.22	0.17	6.35	.0005
Emotional function	MED/RAD	4.04	0	2.68	0.002	9.12	<.0001
Social function	SCT	−5.75	0.073	3.39	0.41	7.71	.002
Social function	MED/RAD	−0.35	0.82	2.95	0.042	10.60	<.0001
Cognitive function	SCT	−1.33	0.51	−0.61	0.82	11.39	<.0001
Cognitive function	MED/RAD	0.89	0.35	3.21	0.005	10.79	<.0001
Global QOL	SCT	−15.22	0	6.85	0.005	7.27	<.0001
Global QOL	MED/RAD	−1.37	0.20	3.33	0.0007	11.76	<.0001

ISSN: 1471-2407