Evidence map›Paper›PMID 22490319›Full record

ArticleCancer epidemiology, biomarkers & prevention : a publication of the American Association for Cancer Research, cosponsored by the American Society of Preventive Oncology2012

Selection bias in population-based cancer case-control studies due to incomplete sampling frame coverage.

Matthew C Walsh, Amy Trentham-Dietz, Ronald E Gangnon, F Javier Nieto, Polly A Newcomb, Mari Palta

Open access · greenAbstract read
In one paragraph

Article in Cancer epidemiology, biomarkers & prevention : a publication of the American Association for Cancer Research, cosponsored by the American Society of Preventive Oncology, 2012. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 9 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
9citing papers in PubMed, 1 pooled it
0.2field-weighted citation impact, top 44% of its field
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

9 citing papers in PubMed, 1 synthesis or guideline pooled it, 15 citations in OpenAlex.

  1. Pooled it
  2. Article
  3. Article
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  5. Article
  6. [Systematic errors in clinical studies : A comprehensive survey].Der Ophthalmologe : Zeitschrift der Deutschen Ophthalmologischen Gesellschaft · 2017
    Review
  7. Review
  8. 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

6 authors at 3 institutions in 1 country.

Matthew C WalshUniversity of Wisconsin-Madison, Middleton, WI 53562, USA. walsh2@wisc.edu
Amy Trentham-Dietz
Ronald E Gangnon
F Javier Nieto
Polly A Newcomb
Mari Palta
Cancer Research Center · USFred Hutch Cancer Center · USUniversity of Wisconsin Carbone Cancer Center · US

Funding

Institutional Clinical and Translational Science AwardUL1TR000427 · NCATS · UNIVERSITY OF WISCONSIN-MADISON · PI DREZNER, MARC KENNETH · 2012 to 2016
$32.2M
INSTITUTIONAL CTSA (UW-MADISON): CLINICAL TRIALSUL1RR025011 · NCRR · UNIVERSITY OF WISCONSIN-MADISON · PI DREZNER, MARC KENNETH · 2007 to 2011
$29.5M
RISK FACTORS AND BIOMARKERS FOR IN SITU BREAST CANCERR01CA067264 · NCI · UNIVERSITY OF WISCONSIN-MADISON · PI TRENTHAM-DIETZ, AMY · 1996 to 2013
$3.6M
PHYSICAL ACTIVITY, LIFESTYLE AND OVARIAN CANCER RISKR01CA047147 · NCI · UNIVERSITY OF WISCONSIN-MADISON · PI NEWCOMB, POLLY A · 1988 to 2007
$2.6M
Training and Research in Colon Cancer SurvivalK05CA152715 · NCI · FRED HUTCHINSON CANCER RESEARCH CENTER · PI NEWCOMB, POLLY A · 2010 to 2019
$991k
Improving Case-Control Study Validity By Addressing Sampling Frame LimitationsR36CD000712 · CD · UNIVERSITY OF WISCONSIN-MADISON · PI WALSH, MATTHEW CUNNINGHAM · 2009 to 2009
$37k
NCATS NIH HHS UL1 TR000427NCI NIH HHS CA47147NCI NIH HHS CA67264NCI NIH HHS K05 CA152715NCI NIH HHS R01 CA047147NCI NIH HHS R01 CA067264NCRR NIH HHS UL1 RR025011ODCDC CDC HHS CD000712ODCDC CDC HHS R36 CD000712
6 · The paper itself

Abstract

backgroundIncreasing numbers of individuals are choosing to opt out of population-based sampling frames due to privacy concerns. This is especially a problem in the selection of controls for case-control studies, as the cases often arise from relatively complete population-based registries, whereas control selection requires a sampling frame. If opt out is also related to risk factors, bias can arise.

methodsWe linked breast cancer cases who reported having a valid driver's license from the 2004-2008 Wisconsin women's health study (N = 2,988) with a master list of licensed drivers from the Wisconsin Department of Transportation (WDOT). This master list excludes Wisconsin drivers that requested their information not be sold by the state. Multivariate-adjusted selection probability ratios (SPR) were calculated to estimate potential bias when using this driver's license sampling frame to select controls.

resultsA total of 962 cases (32%) had opted out of the WDOT sampling frame. Cases age <40 (SPR = 0.90), income either unreported (SPR = 0.89) or greater than $50,000 (SPR = 0.94), lower parity (SPR = 0.96 per one-child decrease), and hormone use (SPR = 0.93) were significantly less likely to be covered by the WDOT sampling frame (α = 0.05 level).

conclusionsOur results indicate the potential for selection bias due to differential opt out between various demographic and behavioral subgroups of controls. As selection bias may differ by exposure and study base, the assessment of potential bias needs to be ongoing. IMPACT: SPRs can be used to predict the direction of bias when cases and controls stem from different sampling frames in population-based case-control studies.

Indexed as

Selection BiasAdultAgedCase-Control StudiesHumansMiddle AgedNeoplasmsRisk FactorsYoung Adult

Identifiers

PMID22490319
PMCPMC3645306
OpenAlexW2134473893

What OpenQuestion holds

Textmetadata
LicenceTDM
Read underepoch 390

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.