Evidence map›Paper›PMID 26477633›Full record

ArticleJournal of biomedical informatics2015

Combining Fourier and lagged k-nearest neighbor imputation for biomedical time series data.

Shah Atiqur Rahman, Yuxiao Huang, Jan Claassen, Nathaniel Heintzman, Samantha Kleinberg

Abstract read
In one paragraph

Article in Journal of biomedical informatics, 2015. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 22 papers.

0numbers the graph read from it
0cells of the map it votes in
22citing 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

22 citing papers in PubMed.

  1. Article
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  6. Observational
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  11. Automated meal detection from continuous glucose monitor data through simulation and explanation.Journal of the American Medical Informatics Association : JAMIA · 2019
    Article
  12. Review
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  15. Article
  16. Automated Identification of Causal Moderators in Time-Series Data.Proceedings of machine learning research · 2018
    Article
  17. Review
  18. Article
  19. Article
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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

5 authors.

Shah Atiqur RahmanDepartment of Computer Science, Stevens Institute of Technology, NJ, United States. Electronic address: srahman1@stevens.edu.
Yuxiao HuangDepartment of Computer Science, Stevens Institute of Technology, NJ, United States. Electronic address: yhuang23@stevens.edu.
Jan ClaassenDivision of Critical Care Neurology, Department of Neurology, Columbia University, College of Physicians and Surgeons, New York, NY, United States. Electronic address: jc1439@cumc.columbia.edu.
Nathaniel HeintzmanDexcom Inc., San Diego, CA, United States. Electronic address: nheintzman@Dexcom.com.
Samantha KleinbergDepartment of Computer Science, Stevens Institute of Technology, NJ, United States. Electronic address: skleinbe@stevens.edu.

Funding

BIGDATA: Causal Inference in Large-Scale Time Series with Rare and Latent EventsR01LM011826 · NLM · THE TRUSTEES OF THE STEVENS INSTITUTE OF TECHNOLOGY · PI KLEINBERG, SAMANTHA · 2013 to 2024
$3.3M
NLM NIH HHS R01 LM011826NLM NIH HHS R01LM011826
6 · The paper itself

Abstract

Most clinical and biomedical data contain missing values. A patient's record may be split across multiple institutions, devices may fail, and sensors may not be worn at all times. While these missing values are often ignored, this can lead to bias and error when the data are mined. Further, the data are not simply missing at random. Instead the measurement of a variable such as blood glucose may depend on its prior values as well as that of other variables. These dependencies exist across time as well, but current methods have yet to incorporate these temporal relationships as well as multiple types of missingness. To address this, we propose an imputation method (FLk-NN) that incorporates time lagged correlations both within and across variables by combining two imputation methods, based on an extension to k-NN and the Fourier transform. This enables imputation of missing values even when all data at a time point is missing and when there are different types of missingness both within and across variables. In comparison to other approaches on three biological datasets (simulated and actual Type 1 diabetes datasets, and multi-modality neurological ICU monitoring) the proposed method has the highest imputation accuracy. This was true for up to half the data being missing and when consecutive missing values are a significant fraction of the overall time series length.

Indexed as

Fourier AnalysisModels, TheoreticalBiomedical dataImputationMissing dataTime series

Identifiers

PMID26477633
PMCPMC4755282

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Registered trials

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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.