A critical analysis of test-retest reliability in instrument validation studies of cancer patients under palliative care: a systematic review

Table 4 Median values of time intervals of studies with non-adequate (<0.70) and adequate (≥0.70) test-retest values

Evaluated domains	Number of studies	Time interval (hours) Median (Q1-Q3)		p-value*
Evaluated domains	Number of studies	Test-retest < 0.70	Test-retest ≥ 0.70	p-value*
Global HRQoL	19	168 (36–168)	60 (36.75-206)	0.565
Emotional	8	168¹	168 (48–204)	-
Physical	5	168¹	108 (30–195)	-
Social	6	186²	108 (48–195)	-
Functioning	3	-	168³	-
Existential	6	120¹	168 (48–232)	-
Global symptoms	5	25.75²	48³	-
Pain	18	120 (42–168)	48 (3–168)	0.262
Nausea	12	108 (33–168)	24 (3–72)	0.146
Fatigue	11	48 (24–168)	3 (2.5-120)	0.184
Anxiety	10	72 (36–168)	48 (8.25-144)	0.443
Depression	9	102 (27–168)	60 (18.75-96)	0.587

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