Concepedia

Sealed Opaque Envelopes

Sealed Opaque Envelopes is a physical allocation concealment technique in which sequentially numbered, sealed, and visually impenetrable envelopes are used to prevent foreknowledge of treatment assignment in randomized controlled trials.

40

Publications

2.6K

Citations

201

Authors

84

Institutions

Publications per year

2017–2026

14

Parents

Publications

40

Randomization and allocation concealment: a practical guide for researchers

Gordon S. Doig, F. O. Simpson · Journal of Critical Care · 2005 · 654 citations

, , +6

Cytokine adsorption in patients with severe COVID-19 pneumonia requiring extracorporeal membrane oxygenation (CYCOV): a single centre, open-label, randomised, controlled trial

Alexander Supady, Enya Weber, Marina Rieder et al. · The Lancet Respiratory Medicine · 2021 · 200 citations · Full text

, , +17

Canadian Association of General Surgeons Evidence Based Reviews in Surgery. 10. Laparoscopy-assisted colectomy versus open colectomy for treatment of non-metastatic colon cancer: a randomized trial.

Robin S. McLeod, Hartley Stern · PubMed · 2004 · 163 citations · Full text

, , +17

A randomized double blind comparison of real and placebo acupuncture in IVF treatment

E. W. S. So, Ernest Hung Yu Ng, Yu Yeuk Wong et al. · Human Reproduction · 2008 · 141 citations

, , +12

Clinical and technical outcomes from a randomized clinical trial of endovenous laser ablation compared with conventional surgery for great saphenous varicose veins

Daniel Carradice, Anthony Mekako, Fayyaz Mazari et al. · British journal of surgery · 2011 · 129 citations · Full text

, , +15

1–5 of 40

Authors

201

  1. EH
    Ernest Hung Yu Ng

    University of Hong Kong, Hong Kong SAR China

    2 publications · 158 citations

    2

    h-index

  2. GJ
    G Justus Hofmeyr

    University of the Witwatersrand, South Africa

    2 publications · 127 citations

    2

    h-index

  3. DT
    David Torgerson

    University of York, United Kingdom

    2 publications · 79 citations

    2

    h-index

  4. BB
    Baron B Matonhodze

    University of the Witwatersrand, South Africa

    2 publications · 127 citations

    2

    h-index

  5. TK
    Torben Kjær Nielsen

    University of Copenhagen, Denmark

    1 publications · 14 citations

    1

    h-index

1–5 of 201

Institutions

84

  1. University of the Witwatersrand

    Johannesburg, South Africa

    3 h-index

    7 publications

    352 citations

  2. Radboud University Nijmegen

    Nijmegen, The Netherlands

    2 h-index

    5 publications

    218 citations

  3. University of Hong Kong

    Pok Fu Lam, Hong Kong

    2 h-index

    9 publications

    897 citations

  4. University of York

    York, United Kingdom

    2 h-index

    5 publications

    172 citations

  5. Radboud University Medical Center

    Nijmegen, The Netherlands

    2 h-index

    5 publications

    218 citations

  6. University of Freiburg

    Freiburg im Breisgau, Germany

    2 h-index

    24 publications

    4.7K citations

  7. University of Oxford

    Oxford, United Kingdom

    2 h-index

    4 publications

    207 citations

  8. Singapore General Hospital

    Singapore, Singapore

    2 h-index

    11 publications

    378 citations

1–8 of 84

Venues

  1. 3

    h-index

  2. PubMed

    Repository · 3 publications · 206 citations

    3

    h-index

  3. Human Reproduction

    3 publications · 214 citations

    3

    h-index

  4. The Angle Orthodontist

    2 publications · 123 citations

    2

    h-index

  5. Journal of Critical Care

    2 publications · 676 citations

    2

    h-index

1–5