Cancer symptoms indicate physiologic changes associated with disease and treatment toxicity, and also reflect linkages to patients’ perceived reality, including social, psychological and cultural factors.
4 Pain and fatigue are the two pre-eminent, significant symptoms that are addressed in virtually every publication about cancer experiences and supportive care of persons with cancer. The prevalence of elevated psychosocial distress among patients with cancer at diagnosis and recurrence is reported to be at least 30%,
5 with clinical depression occurring in 25% of cases.
6 Kroenke et al.
7 reported highly prevalent somatic symptoms in 405 subjects with pain and depression from 16 rural cancer clinics; the most common being fatigue, sleep concerns and memory difficulty. This group of symptoms also was strongly associated with self-reported bother and disability scores. Most research literature about cancer treatment and symptoms assumes that symptoms mediate between types of treatment and diminishing aspects of function. For example, Given and colleagues
8 studied the relationship between symptoms and physical functioning in elderly patients with cancer, reporting a significant relationship between symptoms and function which was independent of treatment modality or cancer site. With the incidence of individual and groups of cancer symptoms at such a high level across various diagnoses and stages and the apparent impact of such experiences on dimensions of quality of life, the consequences of inadequate symptom management are complex and can be overwhelming to patients and their caregivers. For example: animal models suggest that uncontrolled pain may shorten survival,
9 severe mucositis
10 or radiation-associated skin changes
11 put patients at risk for additional complications
12 and gastrointestinal complications can compromise quality of life in practically all domains.
13 Adequate SQL assessment and management also have implications for cancer therapy outcomes. For example, in squamous cell carcinomas of the head and neck and cervix, longer overall treatment times due to delays have resulted in poorer cancer-control outcomes.
14 The adverse effect of treatment prolongation in cervical cancer by high-dose-rate brachytherapy suggests that poorly-controlled treatment-related symptoms are a key source of treatment delays.
15 The program of research conducted by the Givens’ team with multiple diagnoses in the community setting has informed our understanding of cancer symptoms in ambulatory patients and how home monitoring, nursing support and self-care impacts symptom intensity
16, 17, hospital admissions
18 and emergency room care.
19Other demographic variables and treatment scenarios bring cancer SQLI to the forefront. Because adults over 65 years comprise 61% of all patients with cancer,
20 we must note that co-morbid illnesses experienced by older adults, notably congestive heart failure, have deleterious effects on cancer survival.
21 Unfortunately, there is a paucity of information concerning the factors that modify treatment effect, tolerance and toxicity in elderly patients. Quality of life and symptom profiles are important factors when making treatment decisions in prostate cancer
22 and breast cancer care. This may be particularly true when the disease is either incurable (stage 4) or likely to be cured with any of a variety of approaches (stage 1). There is evidence that clinicians under-report toxicities for patients with breast cancer and that patient-reported outcomes are more accurate.
23Early screening for psychosocial distress is recommended as a preferred practice by the National Quality Forum
24 and the National Comprehensive Cancer Network (NCCN)
25 and may enable clinicians to identify patients at higher risk and intervene to prevent development of crisis events.
26 Discussing SQLI in the clinic can promote partnership between clinicians and patients, validating the patients’ experiences and enhancing communication and satisfaction.
27 Yet, recent trends in ambulatory care to reduce clinician time spent with each patient have rendered existing measures less feasible.
6 Rapid, predictive screening may help reduce unnecessary health care utilization costs and prolonged medical treatments, as well as enhance quality of life.
28 The challenge of efficient, systematic and meaningful assessment is important and timely in current clinical cancer settings.
Because of developments in the science of cancer screening, detection, and treatment, plus collaborative involvement of various professionals and consumers, quality of life (QoL) and symptom assessment is now an established, integral component of cancer clinical trials. While major comprehensive cancer centers have developed and reported the routine clinical use of multi-symptom assessment tools,
29 the routine clinical use of QoL questionnaires (including symptom scales) has been reported and evaluated only on a limited basis and rarely in the United States (US).
27, 30–34