Estimation of the additional costs of chemotherapy for patients with advanced non-small cell lung cancer

Erlotinib and gefitinib for treating non-small cell lung cancer that has progressed following prior chemotherapy (review of NICE technology appraisals 162 and 175): a systematic review and economic evaluation

BACKGROUND

Lung cancer is the second most diagnosed cancer in the UK. Over 70% of lung cancers are non-small cell lung cancers (NSCLCs). Patients with stage III or IV NSCLC may be offered treatment to improve survival, disease control and quality of life. One-third of these patients receive further treatment following disease progression; these treatments are the focus of this systematic review.

OBJECTIVES

To appraise the clinical effectiveness and cost-effectiveness of erlotinib [Tarceva(®), Roche (UK) Ltd] and gefitinib (IRESSA(®), AstraZeneca) compared with each other, docetaxel or best supportive care (BSC) for the treatment of NSCLC after disease progression following prior chemotherapy. The effectiveness of treatment with gefitinib was considered only for patients with epidermal growth factor mutation-positive (EGFR M+) disease.

DATA SOURCES

Four electronic databases (EMBASE, MEDLINE, The Cochrane Library, PubMed) were searched for randomised controlled trials (RCTs) and economic evaluations. Manufacturers' evidence submissions to the National Institute for Health and Care Excellence were also considered.

REVIEW METHODS

Outcomes for three distinct patient groups based on EGFR mutation status [EGFR M+, epidermal growth factor mutation negative (EGFR M-) and epidermal growth factor mutation status unknown (EGFR unknown)] were considered. Heterogeneity of the data precluded statistical analysis. A de novo economic model was developed to compare treatments (incremental cost per quality-adjusted life-year gained).

RESULTS

Twelve trials were included in the review. The use of gefitinib was compared with chemotherapy (n = 6) or BSC (n = 1), and the use of erlotinib was compared with chemotherapy (n = 3) or BSC (n = 1). One trial compared the use of gefitinib with the use of erlotinib. No trials included solely EGFR M+ patients; all data were derived from retrospective subgroup analyses from six RCTs [Kim ST, Uhm JE, Lee J, Sun JM, Sohn I, Kim SW, et al. Randomized phase II study of gefitinib versus erlotinib in patients with advanced non-small cell lung cancer who failed previous chemotherapy. Lung Cancer 2012;75:82-8, V-15-32, Tarceva In Treatment of Advanced NSCLC (TITAN), BR.21, IRESSA Survival Evaluation in Lung cancer (ISEL) and IRESSA NSCLC Trial Evaluating REsponse and Survival versus Taxotere (INTEREST)]. These limited data precluded conclusions regarding the clinical effectiveness of any treatment for EGFR M+ patients. For EGFR M- patients, data were derived from the TArceva Italian Lung Optimization tRial (TAILOR) trial and Docetaxel and Erlotinib Lung Cancer Trial (DELTA). Retrospective data were also derived from subgroup analyses of BR.21, Kim et al., TITAN, INTEREST and ISEL. The only statistically significant reported results were for progression-free survival (PFS) for TAILOR and DELTA, and favoured docetaxel over erlotinib [TAILOR hazard ratio (HR) 1.39, 95% confidence interval (CI) 1.06 to 1.82; DELTA HR 1.44, 95% CI 1.08 to 1.92]. In EGFR unknown patients, nine trials (INTEREST, IRESSA as Second-line Therapy in Advanced NSCLC - KoreA, Li, Second-line Indication of Gefitinib in NSCLC, V-15-32, ISEL, DELTA, TITAN and BR.21) reported overall survival data and only one (BR.21) reported a statistically significant result favouring the use of erlotinib over BSC (HR 0.7, 95% CI 0.58 to 0.85). For PFS, BR.21 favoured the use of erlotinib when compared with BSC (HR 0.61, 95% CI 0.51 to 0.74) and the use of gefitinib was favoured when compared with BSC (HR 0.82, 95% CI 0.73 to 0.92) in ISEL. Limitations in the clinical data precluded assessment of cost-effectiveness of treatments for an EGFR M+ population by the Assessment Group (AG). The AG's economic model suggested that for the EGFR M- population, the use of erlotinib was not cost-effective compared with the use of docetaxel and compared with BSC. For EGFR unknown patients, the use of erlotinib was not cost-effective when compared with BSC.

CONCLUSIONS/FUTURE WORK

The lack of clinical data available for distinct patient populations limited the conclusions of the assessment. Future trials should distinguish between patients with EGFR M+ and EGFR M- disease.

FUNDING

The National Institute for Health Research Health Technology Assessment programme.

A cross-country review of data collected on non-small cell lung cancer (NSCLC) patients in cancer registries, databases, retrospective and non-randomized prospective studies

INTRODUCTION

An increased number of pharmacotherapies exist to treat advanced NSCLC. This necessitates a review of the available information on routine-care treatment patterns, the outcome of treatment, and resource utilization for patients diagnosed and treated with advanced NSCLC that could inform evidence-based treatment decisions and aid decisions on the most cost-effective treatment alternatives.

METHODS

PubMed and the Health Economic Evaluations Database were searched for retrospective or non-randomized prospective studies between January 2000 and May 2012 that included information on treatment patterns, treatment outcomes including health-related quality-of-life (HRQoL), and resource utilization. In addition, registries and databases were identified from retrieved publications and internet searches. Data collected in registries and databases was summarized for eight European countries (Belgium, France, Germany, Italy, Sweden, Turkey, the Netherlands, the UK), Australia, and Canada.

RESULTS

The literature search resulted in 410 studies, whereof 87 studies met the study inclusion criteria. In total, 49 were retrospective chart reviews or database analyses, 30 non-randomized prospective studies, and eight HRQoL studies. Two studies compared treatment patterns and/or treatment outcomes across countries. Altogether, 181 cancer registries in the countries studied were identified. Clinical cancer-specific patient registries were identified in Australia and Germany. Databases or linkage systems that enable retrieval of complete information of patient disease history were found in Australia, Canada, the Netherlands, Sweden, and the UK. Cancer registries and databases were found to collect information on NSCLC patient demographics, NSCLC or lung cancer diagnosis, disease stage, performance status, treatment, treatment outcomes, and resource use. Differences existed between country registries and databases in whether information was collected on each of these data points.

CONCLUSION

The literature review revealed few published NSCLC studies on treatment, treatment outcomes, and resource use in routine clinical practice and on HRQoL. Registries and databases were found to collect some of this information, however not systematically.

Economics of treatments for non-small cell lung cancer

The purpose of this article is to review the economics of treatments for non-small cell lung cancer (NSCLC). We systematically analysed the cost effectiveness of treatments for the different stages of NSCLC, with particular emphasis on more recently approved agents. Numerous economic analyses in NSCLC have been conducted, with a variety of methods and in a number of countries. In patients with localized disease, adjuvant chemotherapy appears to have greater cost effectiveness than observation; however, there are few published data. In locally advanced disease, combined modalities (chemotherapy, surgery and/or radiotherapy) are probably cost effective, but high-quality economic analyses are lacking. In advanced NSCLC, third-generation chemotherapies used in the first-line setting can be administered with acceptable incremental cost effectiveness. In the second-line setting, new agents (docetaxel, pemetrexed and erlotinib) have acceptable cost effectiveness. The lack of cost-utility analyses for elderly patients and patients with a poor prognosis rules out firm conclusions. This review suggests that most therapies for NSCLC are cost effective when the patient has a good performance status, with an incremental cost-effectiveness ratio under USD 50,000 per life-year gained in the majority of cases.

Psychosocial factors in lung cancer: quality of life, economic impact, and survivorship implications

Lung cancer is the leading cause of cancer mortality in men and women. Lung cancer accounts for approximately 30% of all cancer deaths in the United States. In addition, it is the most often diagnosed cancer in men, and the second most often diagnosed cancer in women. Five-year survival rates in lung cancer remain very low, around 15%. Approximately 45% of patients present with stage III disease. The majority of these patients are considered non-resectable, leading to the poor survival statistics seen in this disease. Unfortunately, survival rates have not improved in the past 30 years despite much research in diagnostics and therapeutics. Patients with advanced disease often experience multiple symptoms, including fatigue, pain, dyspnea, cough, hemoptysis, and anorexia. This paper will review the enormous toll that lung cancer takes on society, as well as individuals and families affected. In addition, we will examine psychosocial factors pertinent to lung cancer. Specifically, the article briefly discusses treatment approaches to lung cancer, as they relate to quality of life (QOL). QOL as a construct within lung cancer is then reviewed. Comment is made on the evaluation and prognostic importance of QOL. Next, economic and survivorship aspects of lung cancer are discussed. Finally, a summary of relevant psychosocial interventions for patients diagnosed with lung cancer is given.