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Does the use of telephone reminders to increase survey response rates affect outcome estimates? An ancillary analysis of a prospective cohort study of patients with low back pain

Crossref DOI link: https://doi.org/10.1186/s12891-021-04787-4

Published Online: 2021-10-20

Published Print: 2021-12

Update policy: https://doi.org/10.1007/springer_crossmark_policy

Authors

Udby, Christina Lyngsø

Riis, Allan

Thomsen, Janus Laust

Rolving, Nanna
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Article History

Received: 13 April 2021

Accepted: 12 October 2021

First Online: 20 October 2021

Declarations

:

: All patients gave written informed consent online and were informed that their consent could be withdrawn at any time. This is an observational study, and all patients received treatment as usual. In accordance with the Danish Scientific Ethical Committees Act, survey studies do not require approval by an ethics committee (§14, part 2) [CitationRef removed]. All experimental protocols were approved by the executive management of the Spine Centre at Silkeborg Regional Hospital. The original trial is registered with the Danish Data Protection Agency (Central Denmark Region, journal no. 1–16–02-23-17).

: Not applicable.

: AR is member of the editorial board at BMC Musculoskeletal Disorders. The other authors declare that they have no competing interests.

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