Table 2 Psychometric properties of quality of life instruments in long-term breast cancer survivors.
From: A systematic review of quality of life instruments in long-term breast cancer survivors
Instruments | Reliability | Validity | Responsiveness |
|---|---|---|---|
Disease-specific measures | |||
Body Image and Relationships Scale (BIRS) [14] | Internal consistency = 0.94 | Convergent and divergent | Not Reported |
Cancer Rehabilitation Evaluation System Cancer-Short Form (CARES-SF) [15] | Internal consistency (for domains, 0.85-0.61) | Concurrent | Not Reported |
European Organization for Research and Treatment of Cancer (EORTC QLQ-C30) [16–18] | Internal consistency > 0.70 | Content, concurrent, discriminant | Not Reported |
European Organization for Research and Treatment of Cancer-Breast Module (EORTC QLQ-BR23) [19] | Internal consistency: American sample (0.70-0.91); Dutch sample (0.57-0.89); Spanish sample (0.46-0.94) | Content, construct, criterion-related | Dutch &Spanish sample showed responsiveness in side effects & body image; no responsiveness tested in American sample. |
Ferrans and Powers's Quality of Life Index-Cancer Version (QLI-CV) [20] | Internal consistency = 0.95 | Concurrent (criterion-related, r = 0.80), construct. | Not Reported |
Functional Assessment of Cancer Therapy-Breast (FACT-B) [21] | Internal consistency = 0.90 Test-retest = 0.85 | Content, construct, concurrent (r = 0.87), divergent, known group | Sensitivity to 2-month changes found for FACT-B global, FACT-G global, physical well-being, functional well-being, breast cancer subscale. |
Functional Assessment of Cancer Therapy-General (FACT-G) [22] | Internal consistency = 0.89 Test-retest = 0.92 | Content, construct, divergent, known group. | Not Reported |
Functional Assessment of Chronic Illness Therapy-Spiritual Well Being Scale (FACIT-SP) [23] | Internal consistency = 0.81-0.88 | Discriminant, convergent | Not Reported |
Quality of Life-Cancer Survivors tool (QOL-CS) [24] | Internal consistency = 0.93 Test-retest = 0.89 | Content, concurrent (r = 0.78), predictive, construct, discriminate | Not Reported |
Quality of Life in Adult Cancer Survivors Scale (QLACS) [25] | Internal consistency (generic = 0.95, cancer-specific = 0.98) | Concurrent, retrospective | Change in health status |
Condition- specific measures | |||
Fatigue Symptom Inventory (FSI) [26] | Internal consistency > 0.70 | Convergent, divergent, construct | Not Reported |
Multidimensional Fatigue Symptom Inventory (MFSI) [27] | Internal consistency = 0.87-0.92 | Convergent and divergent | Significant differences in expected direction were found between cancer patients and non-cancer patients. |