FACT-Anemia: Functional Assessment of Cancer Therapy—Anemia
Functional Assessment of Cancer Therapy—Anemia · Also known as: FACT-An
The FACT-Anemia (FACT-An) is a quality-of-life measure combining the 27-item FACT-G core with a disease-specific subscale focusing on fatigue and anemia-related symptoms common in cancer patients receiving chemotherapy or dealing with cancer-induced anemia. Developed by Yellen et al. in 1997, it quantifies the impact of chemotherapy-induced anemia on functional and emotional well-being, supporting clinical trials and anemia treatment research.
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When to use it
FACT-Anemia is indicated for cancer patients undergoing chemotherapy or those experiencing cancer-related anemia, particularly in clinical trials evaluating anemia interventions (erythropoiesis-stimulating agents, iron therapy, transfusion strategies). Primary use is clinical trials and anemia treatment research; secondary use in oncology practice to monitor fatigue and anemia-related QoL impact. NOT for screening or non-cancer anemia diagnosis. Particularly valuable when assessing trade-offs in anemia management (e.g., ESA benefits vs. thromboembolic risk, transfusion burden vs. functional improvement).
Strengths & limitations
- Dedicated fatigue and anemia subscale directly measures chemotherapy-induced anemia symptoms and fatigue-related functional decline, a primary concern in cancer patients.
- Captures fatigue impact on work, social engagement, and emotional well-being—dimensions often missed by hemoglobin-alone assessment.
- Validated in large, diverse cancer populations receiving various chemotherapy regimens and anemia treatments; strong psychometric properties.
- Public domain, no cost; freely available in multiple languages.
- Sensitive to anemia treatment response and chemotherapy-induced anemia trajectory, supporting clinical trial endpoints and practice-based QoL monitoring.
- AFS subscale (14 items) is somewhat overlapping with PWB subscale (fatigue overlap); clinical interpretation should consider FACT-G structure.
- Does not differentiate anemia from other cancer-related fatigue sources (disease burden, depression, sleep disorders); supplementary assessments may be needed.
- Limited validation in non-chemotherapy anemia contexts (chronic kidney disease anemia, myelodysplastic syndrome) or anemia unrelated to cancer treatment.
- Ceiling effects in patients with well-managed anemia; may not detect subtle improvements in asymptomatic or well-treated patients.
Frequently asked
Can FACT-An be used in non-anemic cancer patients to measure chemotherapy-related fatigue?
Yes. While FACT-An was designed for anemia contexts, the AFS subscale validly measures chemotherapy-related fatigue in any cancer population. The scale is sensitive to fatigue whether anemia-related or from other causes (disease burden, depression, pain). However, if anemia is not a clinical concern, a general fatigue scale (e.g., FACIT-Fatigue) may be more focused. Both are valid depending on research question.
How does FACT-An differ from FACIT-Fatigue?
FACIT-Fatigue is a 13-item fatigue-specific scale (standalone, not cancer-domain-specific) measuring energy and functional impact of fatigue. FACT-An (41 items) includes the full FACT-G general cancer QoL core plus anemia-specific items. FACIT-Fatigue is briefer and fatigue-focused; FACT-An provides comprehensive cancer QoL context. For anemia trials, FACT-An preferred; for fatigue-only assessment, FACIT-Fatigue is more efficient.
What is the MCID for FACT-An AFS subscale, and how is it applied in anemia trials?
MCID for AFS subscale is approximately 5–6 points on the 0–56 scale. This represents the smallest change a patient would perceive as clinically meaningful in fatigue. In anemia treatment trials, a ≥MCID improvement in AFS (often alongside hemoglobin increase) supports clinical efficacy claims for ESA or iron therapy. MCID contextualizes statistical significance (p-value) with practical clinical importance.
Can FACT-An be used to assess anemia-related fatigue in non-chemotherapy contexts (e.g., myelodysplastic syndrome)?
FACT-An has limited validation outside chemotherapy-induced anemia. For non-chemotherapy cancers or hematologic disorders causing anemia (MDS, aplastic anemia, sickle cell disease), supplementary assessments or alternative anemia-fatigue scales may be more appropriate. If using FACT-An off-label, acknowledge limitation and consider validation in your specific population.
How are missing items in FACT-An scored?
If ≥50% of a subscale's items are missing, do not score that subscale. If <50% are missing, impute the mean of completed items and multiply by full subscale item count. Avoid AFS interpretation if multiple items are missing, as fatigue assessment requires consistent item coverage. Report data completeness with results.
Is FACT-An freely available and validated in other languages?
Yes. FACT-An is public domain (free, no licensing). Official versions and validated translations in 15+ languages are available via FACIT.org and directly from developers. Use official versions to ensure psychometric validity; informal translations are not recommended.
Sources
- Yellen, S. B., Cella, D. F., Webster, K., Blendowski, C., & Kaplan, E. (1997). Measuring fatigue and other anemia-related symptoms with the Functional Assessment of Cancer Therapy (FACT) measurement system. J Pain Symptom Manage, 13(2), 63–74. DOI: 10.1016/S0885-3924(96)00274-6 ↗
- Cella, D. F., Tulsky, D. S., Gray, G., Sarafian, B., Linn, E., Bonomi, A., et al. (1993). The Functional Assessment of Cancer Therapy scale: development and validation of the general measure. J Clin Oncol, 11(3), 570–579. DOI: 10.1200/JCO.1993.11.3.570 ↗
How to cite this page
ScholarGate. (2026, June 3). Functional Assessment of Cancer Therapy—Anemia. ScholarGate. https://scholargate.app/en/oncology/fact-anemia
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