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Published in: BMC Medical Research Methodology 1/2017

Open Access 01-12-2017 | Research article

Recruiting former melanoma patients via hospitals in comparison to office-based dermatologists in a register-based cohort study that required indirect contact

Authors: S. R. Zeissig, V. Weyer-Elberich, K. Emrich, H. Binder, S. Fischbeck, B. H. Imruck, P. Friedrich-Mai, M. E. Beutel, M. Blettner

Published in: BMC Medical Research Methodology | Issue 1/2017

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Abstract

Background

There are detailed reviews about different recruitment strategies, but not with regard to differences between recruitment of hospital-based versus office-based physicians. Within this study, the two different recruitment schemes are compared. Advantages and disadvantages of different ways of recruitment in registry-based studies are discussed.

Methods

In a cross-sectional cancer-registry-based study, long-term melanoma patients were contacted by dermatologists rather than directly by the registry on the basis of the legal situation. Logistic regression models and generalized estimating equations were used to assess effects of various patient and physician characteristics on participation and data quality. Especially differences between hospital-based versus office-based dermatologists are evaluated.

Results

Seventy two out of 112 contacted dermatologists took part in the study (64.3%). The cooperation proportion was 52.2% (689 participants/1320 contacted patients). Participants and non-participants differed regarding age and sex, but not regarding other social demographic factors and cancer stage.
We did not observe a difference in patient participation between hospital-based versus office-based dermatologists (OR 1.08 [CI 0.84–1.39]; p = 0.57). However, medical data provided by the cancer registry were better for participants registered and recruited by hospitals.

Conclusions

In cohort studies with epidemiological cancer registries, recruitment via physicians has potential disadvantages and is more complex. If this indirect way of contact is mandatory, we recommend recruitment procedures including hospital-based rather than office-based physicians. However, physician characteristics were not associated with outcome.
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Metadata
Title
Recruiting former melanoma patients via hospitals in comparison to office-based dermatologists in a register-based cohort study that required indirect contact
Authors
S. R. Zeissig
V. Weyer-Elberich
K. Emrich
H. Binder
S. Fischbeck
B. H. Imruck
P. Friedrich-Mai
M. E. Beutel
M. Blettner
Publication date
01-12-2017
Publisher
BioMed Central
Published in
BMC Medical Research Methodology / Issue 1/2017
Electronic ISSN: 1471-2288
DOI
https://doi.org/10.1186/s12874-017-0425-2

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