Evidence map›Paper›PMID 22531976›Full record

ArticleStatistics in medicine2012

Use of alternative time scales in Cox proportional hazard models: implications for time-varying environmental exposures.

Beth Ann Griffin, Garnet L Anderson, Regina A Shih, Eric A Whitsel

Abstract read
In one paragraph

Article in Statistics in medicine, 2012. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 49 papers.

0numbers the graph read from it
0cells of the map it votes in
49citing papers in PubMed
–field-weighted citation impact
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

49 citing papers in PubMed.

  1. Article
  2. Article
  3. Article
  4. Article
  5. Article
  6. Article
  7. Smooth Hazards With Multiple Time Scales.Statistics in medicine · 2025
    Article
  8. Individual and joint exposures to PMScience China. Life sciences · 2024
    Article
  9. Article
  10. Article
  11. Article
  12. Long-term exposure to air pollution and road traffic noise and incidence of dementia in the Danish Nurse Cohort.Alzheimer's & dementia : the journal of the Alzheimer's Association · 2024
    Article
  13. Article
  14. Observational
  15. Article
  16. Strategies of Modelling Incident Outcomes Using Cox Regression to Estimate the Population Attributable Risk.International journal of environmental research and public health · 2023
    Article
  17. Article
  18. Article
  19. Article
  20. Long-term exposure to ambient NOJournal of advanced research · 2022
    Article
4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

4 authors.

Beth Ann GriffinRAND Corporation, Arlington, VA, USA. bethg@rand.org
Garnet L Anderson
Regina A Shih
Eric A Whitsel

Funding

Neighborhoods, Women and Coronary Heart Disease: A Prospective StudyR01HL084425 · NHLBI · RAND CORPORATION · PI BIRD, CHLOE E. · 2007 to 2009
$2.4M
NHLBI NIH HHS HL084425-01A2NHLBI NIH HHS R01 HL084425
6 · The paper itself

Abstract

Issues surrounding choice of time scales in Cox proportional hazard regression models have received limited attention in the literature. Although the choice between time on study and 'attained' age time scales has been examined, the calendar time scale may be of interest when modeling health effects of environmental exposures with noteworthy secular trends such as ambient particulate matter air pollution in large epidemiological cohort studies. The authors use simulation studies to examine performance (bias, mean squared error, coverage probabilities, and power) of models using all three time scales when the primary exposure of interest depends on calendar time. Results show that performance of models fit to the calendar time scale varies inversely with the strength of the linear association between the time-varying primary exposure and calendar time. Although models fit to attained age and time on study that do not adjust for calendar time were relatively robust, the authors conclude that care should be exercised when using time scales that are highly correlated with exposures of interest.

Indexed as

Proportional Hazards ModelsAgedCohort StudiesComputer SimulationEnvironmental ExposureFemaleHumansMiddle AgedParticulate MatterParticulate Matter

Identifiers

PMID22531976
PMCPMC3468711

What OpenQuestion holds

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Registered trials

None linked

Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.