Is detection of melanoma metastasis during surveillance in an early phase of development associated with a survival benefit?
Leiter, Ulrike, Buettner, Petra G., Eigentler, Thomas K., Forschner, Andrea, Meier, Friedegund, and Garbe, Claus (2010) Is detection of melanoma metastasis during surveillance in an early phase of development associated with a survival benefit? Melanoma Research, 20 (3). pp. 240-246.
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Surveillance schedules in patients with cutaneous melanoma (CM) aim to detect metastatic spread in an early phase of development. Few studies investigated whether detection in an early phase is associated with prolonged survival and whether the observed longer survival times are a mere consequence of detection at an earlier time point (lead time bias). This is a long-term survival analysis of 1969 patients with stage I–III CM documented during 1996–1998 in the frame of a prospective surveillance study. Development of metastatic spread was detected in 112 patients during this period and classified as early phase or advanced phase based on tumor load and operability. The impact of lead time bias on differences in survival probabilities was examined using different statistical approaches. Of 59 patients with metastases detected in an early phase of development, 64.4% died of CM, of 43 patients with advanced phase metastases 86% died (P=0.013). The 10-year overall survival probability was 42.6% for early and 25.6% for advanced phase metastases (P=0.012). This comparison remained significant after adjustment for sojourn time. Multivariate analysis identified detection of early phase metastases (P=0.022) and stage at primary diagnosis (P<0.0001) as independent prognostic factors. In conclusion, this long-term follow-up study showed a factual gain in survival time for the detection of metastasis in an early phase of development beyond lead time bias. The classification of metastasis detected in early and advanced phase may be used in future studies aiming to improve melanoma surveillance.
|Item Type:||Article (Refereed Research - C1)|
|Keywords:||lead time bias, melanoma, metastasis, recurrences, survival probabilities|
|FoR Codes:||11 MEDICAL AND HEALTH SCIENCES > 1117 Public Health and Health Services > 111706 Epidemiology @ 100%|
|SEO Codes:||92 HEALTH > 9201 Clinical Health (Organs, Diseases and Abnormal Conditions) > 920102 Cancer and Related Disorders @ 100%|
|Deposited On:||09 May 2011 20:56|
|Last Modified:||18 Oct 2013 01:15|
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