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Cochrane Database of Systematic Reviews

Postoperative radiotherapy for non-small cell lung cancer

Overview of attention for article published in Cochrane database of systematic reviews, October 2016
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About this Attention Score

  • In the top 25% of all research outputs scored by Altmetric
  • Good Attention Score compared to outputs of the same age (79th percentile)
  • Average Attention Score compared to outputs of the same age and source

Mentioned by

10 tweeters
1 Facebook page
2 Wikipedia pages


50 Dimensions

Readers on

131 Mendeley
Postoperative radiotherapy for non-small cell lung cancer
Published in
Cochrane database of systematic reviews, October 2016
DOI 10.1002/14651858.cd002142.pub4
Pubmed ID

Sarah Burdett, Larysa Rydzewska, Jayne Tierney, David Fisher, Mahesh KB Parmar, Rodrigo Arriagada, Jean Pierre Pignon, Cecile Le Pechoux


The role of postoperative radiotherapy (PORT) in the treatment of patients with completely resected non-small cell lung cancer (NSCLC) was not clear. A systematic review and individual participant data meta-analysis was undertaken to evaluate available evidence from randomised controlled trials (RCTs). These results were first published in Lung Cancer in 2013. To evaluate the effects of PORT on survival and recurrence in patients with completely resected NSCLC. To investigate whether predefined patient subgroups benefit more or less from PORT. We supplemented MEDLINE and CANCERLIT searches (1965 to 8 July 2016) with information from trial registers, handsearching of relevant meeting proceedings and discussion with trialists and organisations. We included trials of surgery versus surgery plus radiotherapy, provided they randomised participants with NSCLC using a method that precluded prior knowledge of treatment assignment. We carried out a quantitative meta-analysis using updated information from individual participants from all randomised trials. We sought data on all participants from those responsible for the trial. We obtained updated individual participant data (IPD) on survival and date of last follow-up, as well as details on treatment allocation, date of randomisation, age, sex, histological cell type, stage, nodal status and performance status. To avoid potential bias, we requested information on all randomised participants, including those excluded from investigators' original analyses. We conducted all analyses on intention-to-treat on the endpoint of survival. We identified 14 trials evaluating surgery versus surgery plus radiotherapy. Individual participant data were available for 11 of these trials, and our analyses are based on 2343 participants (1511 deaths). Results show a significant adverse effect of PORT on survival, with a hazard ratio of 1.18, or an 18% relative increase in risk of death. This is equivalent to an absolute detriment of 5% at two years (95% confidence interval (CI) 2% to 9%), reducing overall survival from 58% to 53%. Subgroup analyses showed no differences in effects of PORT by any participant subgroup covariate.We did not undertake analysis of the effects of PORT on quality of life and adverse events. Investigators did not routinely collect quality of life information during these trials, and it was unlikely that any benefit of PORT would offset the observed survival disadvantage. We considered risk of bias in the included trials to be low. Results from 11 trials and 2343 participants show that PORT is detrimental to those with completely resected non-small cell lung cancer and should not be used in the routine treatment of such patients. Results of ongoing RCTs will clarify the effects of modern radiotherapy in patients with N2 tumours.

Twitter Demographics

The data shown below were collected from the profiles of 10 tweeters who shared this research output. Click here to find out more about how the information was compiled.

Mendeley readers

The data shown below were compiled from readership statistics for 131 Mendeley readers of this research output. Click here to see the associated Mendeley record.

Geographical breakdown

Country Count As %
Japan 1 <1%
United Kingdom 1 <1%
Germany 1 <1%
Unknown 128 98%

Demographic breakdown

Readers by professional status Count As %
Researcher 21 16%
Other 19 15%
Student > Doctoral Student 13 10%
Student > Master 12 9%
Student > Postgraduate 10 8%
Other 30 23%
Unknown 26 20%
Readers by discipline Count As %
Medicine and Dentistry 73 56%
Biochemistry, Genetics and Molecular Biology 9 7%
Pharmacology, Toxicology and Pharmaceutical Science 3 2%
Economics, Econometrics and Finance 3 2%
Agricultural and Biological Sciences 3 2%
Other 10 8%
Unknown 30 23%

Attention Score in Context

This research output has an Altmetric Attention Score of 8. This is our high-level measure of the quality and quantity of online attention that it has received. This Attention Score, as well as the ranking and number of research outputs shown below, was calculated when the research output was last mentioned on 18 June 2020.
All research outputs
of 17,989,531 outputs
Outputs from Cochrane database of systematic reviews
of 11,801 outputs
Outputs of similar age
of 278,797 outputs
Outputs of similar age from Cochrane database of systematic reviews
of 181 outputs
Altmetric has tracked 17,989,531 research outputs across all sources so far. Compared to these this one has done well and is in the 83rd percentile: it's in the top 25% of all research outputs ever tracked by Altmetric.
So far Altmetric has tracked 11,801 research outputs from this source. They typically receive a lot more attention than average, with a mean Attention Score of 25.4. This one has gotten more attention than average, scoring higher than 52% of its peers.
Older research outputs will score higher simply because they've had more time to accumulate mentions. To account for age we can compare this Altmetric Attention Score to the 278,797 tracked outputs that were published within six weeks on either side of this one in any source. This one has done well, scoring higher than 79% of its contemporaries.
We're also able to compare this research output to 181 others from the same source and published within six weeks on either side of this one. This one is in the 45th percentile – i.e., 45% of its contemporaries scored the same or lower than it.