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The DOI matches its Crossref record; 1 of the 1 references it cites were found in a registry or an index.

The logrank test

Open access
Bland, J Martin, Altman, Douglas G·2004·BMJ

Abstract

We often wish to compare the survival experience of two (or more) groups of individuals. For example, the table shows survival times of 51 adult patients with recurrent malignant gliomas1 tabulated by type of tumour and indicating whether the patient had died or was still alive at analysis—that is, their survival time was censored.2 As the figure shows, the survival curves differ, but is this sufficient to conclude that in the population patients with anaplastic astrocytoma have worse survival than patients with glioblastoma? View this table: Weeks to death or censoring in 51 adults with recurrent gliomas1 (A=astrocytoma, G=glioblastoma) Fig 1 Survival curves for women with glioma by diagnosis We could compute survival curves3 for each group and compare the proportions surviving at any specific time. The weakness of this approach is that it does not provide a comparison of the total survival experience of the two groups, but rather gives a comparison at some arbitrary time point(s). In the figure the difference in survival is greater at some times than others and eventually becomes …

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Research works printed but not linked: 3

  1. Rostomily, 1994, Multimodality management of recurrent adult malignant gliomas: results of a phase II multiagent chemotherapy study and analysis of cytoreductive surgery., Neurosurgery, 35, 378, 10.1227/00006123-199409000-00004 · DOI
  2. Bland, 1998, Survival probabilities. The Kaplan-Meier method., BMJ, 317, 1572, 10.1136/bmj.317.7172.1572 · DOI · Paper page
  3. Altman DG . Practical statistics for medical research. London: Chapman & Hall, 1991: 371–5. · DOI · Paper page

Cited by

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Metadata

Authors
Bland, J. M., & Altman, D. G.
Venue
BMJ
Publisher
BMJ
Published
2004-04-29
Volume
328
Issue
7447
Pages
1073
ISSN
  • 0007-1447 (ISSN-L)
  • 0959-8138
  • 1468-5833
OpenAlex
W2137960802
Cited by
928
References
1
FWCI
10.17
Type
journal article
Language
en
Open access
bronze
Licence
www.bmj.com/company/legal-information/terms-conditions/legal-information/tdm-licencepolicy (tdm)

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CoChat. (2026). Citation check: The logrank test. https://app.cochat.ai/papers/10.1136/bmj.328.7447.1073
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Bland, J. M., & Altman, D. G. (2004). The logrank test. BMJ. https://doi.org/10.1136/bmj.328.7447.1073

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