STROCSS 2021 guidelines: What is new?

2a Introduction – briefly describe: • Background • Scientific rationale for this study • Aims and objectives Introduction: the following points are briefly described • Background • Scientific Rationale for this study 2b Methods briefly describe: • Type of study design (e.g. cohort, case-control, cross-sectional etc.) • Other key elements of study design (e.g. retro-/prospective, single/multi-centred etc.) • Patient populations and/or groups, including control group, if applicable • Exposure/interventions (e.g. type, operators, recipients, timeframes etc.) • Outcome measures – state primary and secondary outcome (s) Methods: the following areas are briefly described • Study design (cohort, retro-/ prospective, single/multicentred) • Patient populations and/or groups, including control group, if applicable • Interventions (type, operators, recipients, timeframes) • Outcome measures 2c Results briefly describe: • Summary data with qualitative descriptions and statistical relevance, where appropriate Results: the following areas are briefly described • Summary data (with statistical relevance) with qualitative descriptions, where appropriate 2d Conclusion briefly describe: • Key conclusions • Implications for clinical practice • Need for and direction of future research Conclusion: the following areas are briefly described • Key conclusions • Implications to practice • Direction of and need for future research INTRODUCTION 3 Introduction – comprehensively describe: • Relevant background and scientific rationale for study with reference to key literature • Research question and hypotheses, where appropriate • Aims and objectives Introduction: the following areas are described in full • Relevant background and scientific rationale • Aims and objectives • Research question and hypotheses, where appropriate METHODS 4a Registration • In accordance with the Declaration of Helsinki*, state the research registration number and where it was registered, with a hyperlink to the registry entry Registration and ethics • Research Registry number is stated, in accordance with the declaration of Helsinki* Table 1 (continued )