Quality of Life Instrument - Ovarian Cancer Patient Version (QOL-OC): A Full Guide for Researchers and Clinicians
By ResRef
Published
Explore the QOL-OC, a validated tool for assessing quality of life in ovarian cancer patients, guiding clinicians and researchers.
Introduction
The Quality of Life Instrument - Ovarian Cancer Patient Version (QOL-OC), published by City of Hope National Medical Center, California and developed by Betty Ferrell, Stephany L. Smith, Carey A. Cullinane, and Cindy Melancon, is a pivotal tool for assessing health-related quality of life (HRQOL) in women with ovarian cancer. First adapted in 1996 and revised in 2002, it has earned over 200 citations on Google Scholar, underscoring its value in gynecologic oncology. Consequently, its disease-specific focus makes it indispensable for clinicians and researchers aiming to improve patient outcomes.
This article explores the QOL-OC’s structure, validation, and applications, offering actionable insights for researchers and clinicians in ovarian cancer care.
Key Features of the QOL-OC
Purpose and Use of the QOL-OC
The QOL-OC is designed to evaluate the quality of life in women diagnosed with ovarian cancer, capturing disease-specific concerns such as physical symptoms, emotional distress, treatment side effects and body image issues. Clinicians use it to monitor patient well-being and plan treatments, while researchers employ it in clinical trials and survivorship studies. For example, its focus on multidimensional impacts helps tailor interventions, making it a cornerstone in oncology care.
Target Population
The QOL-OC targets women aged 18 and older with ovarian cancer, particularly those aged 50 and above, though it is adaptable across all adult age groups:
Young Adults (18–24 years)Middle-Aged Adults (25–44 years)Older Adults (45–64 years)Seniors (65+ years)It is especially relevant for patients undergoing treatment or in post-treatment monitoring, ensuring applicability in diverse clinical and research settings.
Structure
The QOL-OC comprises 45 items under the domain of Health-Related Quality of Life. Its sub-domains include:
Physical: Pain, fatigue, and symptom burden (9 items)Psychological: Emotional distress and mental well-being (9 items)Social: Family roles and financial burdens (10 items)Spiritual: Hope and meaning of illness (7 items)Survivorship: Long-term quality of life (1 item)Each item uses a Likert-type scale (0–4), allowing patients to rate their experiences efficiently. As a result, it provides a comprehensive snapshot of HRQOL.
Scoring Method of the QOL-OC
The QOL-OC uses a Likert-type scale, with scores ranging from 0 to 450 (45 items × 4 points). Higher scores indicate better quality of life. Domain-specific scores are calculated by summing relevant items (e.g., Physical: 0–20, Psychological: 0–24). Although no universal cut-off scores exist; scores are interpreted relative to baseline assessments. A 10-point change is considered clinically significant, guiding treatment adjustments and research analysis. For instance, a clinician might prioritize symptom management if physical domain scores decline significantly.
Administration Format and Time
The questionnaire can be administered in multiple formats, including:
paper-based forms.interviews (in-person, phone, or video call).digital platforms.Administering the 45-item QOL-OC typically takes approximately 20–30 minutes offering flexibility in different clinical and research settings. It is self-administered, though interpreting multidimensional scores requires basic training.
Applications of the QOL-OC
The QOL-OC serves multiple roles in clinical and research settings:
Monitoring: Tracks changes in quality of life during treatment or survivorship.Treatment Planning: Guides clinicians in addressing specific patient needs, such as symptom management or emotional support.Research: Supports clinical trials and epidemiological studies, advancing evidence-based oncology care.For example, a score indicating high emotional distress might prompt a referral to psychological support, while researchers can analyze trends in survivorship.
Languages and Availability
To support global use, the QOL-OC is available in:
EnglishSpanishFrenchGermanThis multilingual accessibility enhances its utility in international research and clinical practice.
The QOL-OC is proprietary to City of Hope National Medical Center, but it is free for non-commercial research with permission. Contact Betty Ferrell at bferrell@coh.org or Marcia Grant at mgrant@coh.org for access. You can also visit City of Hope Web: https://www.cityofhope.org/
Reliability and Validity
The QOL-OC demonstrates high reliability and validity, with Cronbach’s alpha values ranging from 0.80 to 0.92 across its domains, reflecting strong internal consistency (Ferrell et al., 1998). Its sensitivity to changes in patient health makes it a trusted tool for monitoring treatment outcomes. Moreover, its robust psychometric properties ensure accuracy in diverse ovarian cancer populations, appealing to both researchers and clinicians.
Limitations and Considerations
Despite its strengths, the QOL-OC has a few limitations:
Length: The 45-item questionnaire may feel lengthy for some patients.Self-report measure: Respondents may be influenced by social desirability bias or personal interpretation.Cultural Bias: Some items may not fully resonate across all cultural contexts.Limited Validation Studies: Fewer studies exist for non-English versions, potentially limiting global applicability.Social desirability bias: Patients might alter their responses to present themselves in a more favorable light.Other Versions and Related Questionnaires
The QOL-OC does not have official short forms or expanded versions. However, researchers often use it alongside other related questionnaires like the EORTC QLQ-OV28 and the FACT-O, which complement its assessment by providing different perspectives on health-related quality of life. For instance, the QLQ-OV28 is considered the gold standard for ovarian cancer-specific HRQOL assessment and its integration with the QLQ-C30 allows for a holistic evaluation of physical, emotional, and social functioning.
Additional Resources
For further exploration, consider these resources:
Original Validation Study: link.Another validation study: link.You can access the questionnaire as a PDF through this link.For inquiries, contact Betty Ferrell at bferrell@coh.org or Marcia Grant at mgrant@coh.org.For additional resources, consult City of Hope web: https://www.cityofhope.org/.Frequently Asked Questions (FAQ)
Who can use the QOL-OC?Clinicians, researchers, and healthcare providers use the QOL-OC for women aged 18 and older with ovarian cancer.
How long does it take to complete the QOL-OC?Patients typically take 20–30 minutes to complete the 45-item QOL-OC, suitable for clinical and research settings.
How is the QOL-OC administered?It can be administered via paper, digital, or mobile app formats, offering flexibility in usage.
Is there any cost to using the QOL-OC?The QOL-OC is free for non-commercial use, but permission from City of Hope may be required for commercial or funded projects.
A word from ResRef about the QOL-OC
The QOL-OC is a foundational, disease-specific quality of life tool that has informed ovarian cancer care for decades. Though newer tools exist, it remains a well-respected instrument for survivorship research and holistic assessment.
References
Ferrell B, Smith SL, Cullinane CA, Melancon C. Psychological well being and quality of life in ovarian cancer survivors. Cancer. 2003 Sep 1;98(5):1061-71. doi: 10.1002/cncr.11291. PMID: 12942576. Study link.Kornblith AB, Thaler HT, Wong G, Vlamis V, Lepore JM, Loseth DB, Hakes T, Hoskins WJ, Portenoy RK. Quality of life of women with ovarian cancer. Gynecol Oncol. 1995 Nov;59(2):231-42. doi: 10.1006/gyno.1995.0014. PMID: 7590479. Study link.