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block randomisation  (STATA Corporation)


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    Structured Review

    STATA Corporation block randomisation
    Stepped-wedge study design of the PEFLA trial. Considering the number of participating centres (16 centres) and the duration of this study (24 months), it was proposed to fix eight intervals of 3 months each. The <t>randomisation</t> will involve seven steps, each of them including two to three centres.
    Block Randomisation, supplied by STATA Corporation, used in various techniques. Bioz Stars score: 90/100, based on 1 PubMed citations. ZERO BIAS - scores, article reviews, protocol conditions and more
    https://www.bioz.com/product/block+randomisation/block+randomisation/pmc12173124-99-5-12
    Average 90 stars, based on 1 article reviews
    block randomisation - by Bioz Stars, 2026-09
    90/100 stars

    Images

    1) Product Images from "Investigating the effectiveness of an intraoperative decision support guided fluid therapy intervention on postoperative outcome of high-risk patients undergoing high-risk abdominal surgery: protocol for an international multicentre stepped-wedge cluster-randomised implementation trial"

    Article Title: Investigating the effectiveness of an intraoperative decision support guided fluid therapy intervention on postoperative outcome of high-risk patients undergoing high-risk abdominal surgery: protocol for an international multicentre stepped-wedge cluster-randomised implementation trial

    Journal: BJA Open

    doi: 10.1016/j.bjao.2025.100421

    Stepped-wedge study design of the PEFLA trial. Considering the number of participating centres (16 centres) and the duration of this study (24 months), it was proposed to fix eight intervals of 3 months each. The randomisation will involve seven steps, each of them including two to three centres.
    Figure Legend Snippet: Stepped-wedge study design of the PEFLA trial. Considering the number of participating centres (16 centres) and the duration of this study (24 months), it was proposed to fix eight intervals of 3 months each. The randomisation will involve seven steps, each of them including two to three centres.

    Techniques Used:

    Related Articles

    Blocking Assay:

    Article Title: Using a cash transfer plus SMS nudge package to improve the wellbeing among caregivers of adolescents living with HIV during the COVID-19 epidemic in South Africa: A pilot randomised controlled trial.
    Article Snippet: .. A statistician (LS) masked to baseline information used block randomisation with random block sizes of two, four, eight, and twelve, assigning participants to one of two trials arms using STATA (Stata Corp, College Station, TX, V 16). ..

    Article Title: Transauricular nerve stimulation in acute ischaemic stroke requiring mechanical thrombectomy: Protocol for a phase 2A, proof-of-concept, sham-controlled randomised trial.
    Article Snippet: .. Block randomisation (blocks of 4) will be undertaken (STATA). .. Immediately after arrival in the interventional radiology suite, continuous ECG is recorded on a Holter monitor (Spacelabs, Hertford UK).


    Article Title: The early use of Antibiotics for at Risk CHildren with InfluEnza-like illness (ARCHIE): a double-blind randomised placebo-controlled trial.
    Article Snippet: .. Allocations were computer generated using block randomisation (block sizes of two and four) by the trial statistician (Stata version 13.1, Stata Corp., College Station, TX, USA). ..

    Article Title: Rivastigmine for Alzheimer's disease
    Article Snippet: .. Behavioral symptoms Cohen‐Mansfield Agitation Inventory (CMAI) Patients were evaluated at 6, 12 and 26 weeks Source of funding Alzheimer's Research Trust, general donation to the main investigator's (Clive Ballard) research programme and profits from previously completed commercial trials Declaration of interest Main investigator has received honoraria and research donations to support this research programme from Novartis and Astra Zeneca (manufacturers) Notes Risk of bias Bias Authors' judgement Support for judgement Random sequence generation (selection bias) Low risk "Computer generated with block randomisation (block sizes of three and six)" done by study statistician using Stata Allocation concealment (selection bias) Low risk "The randomisation clinician faxed a form to the statistician, who communicated allocation to the pharmacy, ensuring concealment" Blinding of participants and personnel (performance bias) All outcomes Low risk Double‐dummy design used, placebo for both types of drugs used Blinding of outcome assessment (detection bias) All outcomes Unclear risk Method not described Incomplete outcome data (attrition bias) All outcomes High risk High number of participants not completing treatment. ..

    Sequencing:


    Article Title: Rivastigmine for Alzheimer's disease
    Article Snippet: .. Behavioral symptoms Cohen‐Mansfield Agitation Inventory (CMAI) Patients were evaluated at 6, 12 and 26 weeks Source of funding Alzheimer's Research Trust, general donation to the main investigator's (Clive Ballard) research programme and profits from previously completed commercial trials Declaration of interest Main investigator has received honoraria and research donations to support this research programme from Novartis and Astra Zeneca (manufacturers) Notes Risk of bias Bias Authors' judgement Support for judgement Random sequence generation (selection bias) Low risk "Computer generated with block randomisation (block sizes of three and six)" done by study statistician using Stata Allocation concealment (selection bias) Low risk "The randomisation clinician faxed a form to the statistician, who communicated allocation to the pharmacy, ensuring concealment" Blinding of participants and personnel (performance bias) All outcomes Low risk Double‐dummy design used, placebo for both types of drugs used Blinding of outcome assessment (detection bias) All outcomes Unclear risk Method not described Incomplete outcome data (attrition bias) All outcomes High risk High number of participants not completing treatment. ..

    Generated:


    Article Title: The early use of Antibiotics for at Risk CHildren with InfluEnza-like illness (ARCHIE): a double-blind randomised placebo-controlled trial.
    Article Snippet: .. Allocations were computer generated using block randomisation (block sizes of two and four) by the trial statistician (Stata version 13.1, Stata Corp., College Station, TX, USA). ..

    Article Title: Rivastigmine for Alzheimer's disease
    Article Snippet: .. Behavioral symptoms Cohen‐Mansfield Agitation Inventory (CMAI) Patients were evaluated at 6, 12 and 26 weeks Source of funding Alzheimer's Research Trust, general donation to the main investigator's (Clive Ballard) research programme and profits from previously completed commercial trials Declaration of interest Main investigator has received honoraria and research donations to support this research programme from Novartis and Astra Zeneca (manufacturers) Notes Risk of bias Bias Authors' judgement Support for judgement Random sequence generation (selection bias) Low risk "Computer generated with block randomisation (block sizes of three and six)" done by study statistician using Stata Allocation concealment (selection bias) Low risk "The randomisation clinician faxed a form to the statistician, who communicated allocation to the pharmacy, ensuring concealment" Blinding of participants and personnel (performance bias) All outcomes Low risk Double‐dummy design used, placebo for both types of drugs used Blinding of outcome assessment (detection bias) All outcomes Unclear risk Method not described Incomplete outcome data (attrition bias) All outcomes High risk High number of participants not completing treatment. ..

    other:

    Article Title: Heart rate variability in pulmonary vascular disease at altitude: a randomised trial
    Article Snippet: Four-block randomisation was performed with Stata (version 16, StataCorp).

    Selection:

    Article Title: Rivastigmine for Alzheimer's disease
    Article Snippet: .. Behavioral symptoms Cohen‐Mansfield Agitation Inventory (CMAI) Patients were evaluated at 6, 12 and 26 weeks Source of funding Alzheimer's Research Trust, general donation to the main investigator's (Clive Ballard) research programme and profits from previously completed commercial trials Declaration of interest Main investigator has received honoraria and research donations to support this research programme from Novartis and Astra Zeneca (manufacturers) Notes Risk of bias Bias Authors' judgement Support for judgement Random sequence generation (selection bias) Low risk "Computer generated with block randomisation (block sizes of three and six)" done by study statistician using Stata Allocation concealment (selection bias) Low risk "The randomisation clinician faxed a form to the statistician, who communicated allocation to the pharmacy, ensuring concealment" Blinding of participants and personnel (performance bias) All outcomes Low risk Double‐dummy design used, placebo for both types of drugs used Blinding of outcome assessment (detection bias) All outcomes Unclear risk Method not described Incomplete outcome data (attrition bias) All outcomes High risk High number of participants not completing treatment. ..



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    Image Search Results


    Stepped-wedge study design of the PEFLA trial. Considering the number of participating centres (16 centres) and the duration of this study (24 months), it was proposed to fix eight intervals of 3 months each. The randomisation will involve seven steps, each of them including two to three centres.

    Journal: BJA Open

    Article Title: Investigating the effectiveness of an intraoperative decision support guided fluid therapy intervention on postoperative outcome of high-risk patients undergoing high-risk abdominal surgery: protocol for an international multicentre stepped-wedge cluster-randomised implementation trial

    doi: 10.1016/j.bjao.2025.100421

    Figure Lengend Snippet: Stepped-wedge study design of the PEFLA trial. Considering the number of participating centres (16 centres) and the duration of this study (24 months), it was proposed to fix eight intervals of 3 months each. The randomisation will involve seven steps, each of them including two to three centres.

    Article Snippet: Randomisation will be performed using block randomisation with a sequence generated in Stata software (version 13; StataCorp) by an independent statistician.

    Techniques: