Objective The study aims to assess the status of registration of observational studies. Study Design and Setting We identified studies on cancer research with prospective recruitment of participants that were registered from February 2000 to December 2011 in ClinicalTrials.gov. We recorded the dates of registration and start of recruitment, outcomes, and description of statistical method. We searched for publications corresponding to the registered studies through May 31, 2014. Results One thousand one hundred nine registered studies were eligible. Primary and secondary outcomes were reported in 809 (73.0%) and 464 (41.8%) of them. The date of registration preceded the month of the study start in 145 (13.8%) and coincided in 205 (19.5%). A total of 151 publications from 120 (10.8%) registered studies were identified. In 2 (33.3%) of the 6 publications where ClinicalTrials.gov reported that the study started recruitment after registration, and in 9 (50.0%) of 18 publications where ClinicalTrials.gov reported the same date for registration and start of recruitment, the articles showed that the study had actually started recruiting before registration. Conclusion During the period reviewed, few observational studies have been registered. Registration usually occurred after the study started, and prespecification of outcomes and statistical analysis rarely occurred. © 2016 Elsevier Inc.

Boccia, S., Rothman, K., Panic, N., Flacco, M., Rosso, A., Pastorino, R., et al. (2016). Registration practices for observational studies on ClinicalTrials.gov indicated low adherence. JOURNAL OF CLINICAL EPIDEMIOLOGY, 70, 176-182 [10.1016/j.jclinepi.2015.09.009].

Registration practices for observational studies on ClinicalTrials.gov indicated low adherence

Manzoli, L.;Boffetta, P.;
2016

Abstract

Objective The study aims to assess the status of registration of observational studies. Study Design and Setting We identified studies on cancer research with prospective recruitment of participants that were registered from February 2000 to December 2011 in ClinicalTrials.gov. We recorded the dates of registration and start of recruitment, outcomes, and description of statistical method. We searched for publications corresponding to the registered studies through May 31, 2014. Results One thousand one hundred nine registered studies were eligible. Primary and secondary outcomes were reported in 809 (73.0%) and 464 (41.8%) of them. The date of registration preceded the month of the study start in 145 (13.8%) and coincided in 205 (19.5%). A total of 151 publications from 120 (10.8%) registered studies were identified. In 2 (33.3%) of the 6 publications where ClinicalTrials.gov reported that the study started recruitment after registration, and in 9 (50.0%) of 18 publications where ClinicalTrials.gov reported the same date for registration and start of recruitment, the articles showed that the study had actually started recruiting before registration. Conclusion During the period reviewed, few observational studies have been registered. Registration usually occurred after the study started, and prespecification of outcomes and statistical analysis rarely occurred. © 2016 Elsevier Inc.
2016
Boccia, S., Rothman, K., Panic, N., Flacco, M., Rosso, A., Pastorino, R., et al. (2016). Registration practices for observational studies on ClinicalTrials.gov indicated low adherence. JOURNAL OF CLINICAL EPIDEMIOLOGY, 70, 176-182 [10.1016/j.jclinepi.2015.09.009].
Boccia, S.; Rothman, K.J.; Panic, N.; Flacco, M.E.; Rosso, A.; Pastorino, R.; Manzoli, L.; La Vecchia, C.; Villari, P.; Boffetta, P.; Ricciardi, W.; I...espandi
File in questo prodotto:
Eventuali allegati, non sono esposti

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11585/671937
 Attenzione

Attenzione! I dati visualizzati non sono stati sottoposti a validazione da parte dell'ateneo

Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus 42
  • ???jsp.display-item.citation.isi??? 40
social impact