OOIR: Observatory of International Research

Papers

(The H4-Index of BMC Medical Research Methodology is 41. The table below lists those papers that are above that threshold based on CrossRef citation counts [max. 250 papers]. The publications cover those that have been published in the past four years, i.e., from 2021-06-01 to 2025-06-01.)

Article	Citations
Mind the gap: covariate constrained randomisation can protect against substantial power loss in parallel cluster randomised trials	409
Does imbalance in chest X-ray datasets produce biased deep learning approaches for COVID-19 screening?	404
coreSCD: multi-stakeholder consensus on core outcomes for sickle cell disease clinical trials	299
regCOVID: Tracking publications of registered COVID-19 studies	246
A gated group sequential design for seamless Phase II/III trial with subpopulation selection	179
Comparing statistical methods in assessing the prognostic effect of biomarker variability on time-to-event clinical outcomes	170
Understanding facilitators of research participation among adults with self-reported chronic pain – a survey examining hypothetical research participation	159
Correction: In health research publications, the number of authors is strongly associated with collective self-citations but less so with citations by others	119
Pre-statistical harmonization of behavioral instruments across eight surveys and trials	117
More than one third of clinical practice guidelines on low back pain overlap in AGREE II appraisals. Research wasted?	102
Should RECOVERY have used response adaptive randomisation? Evidence from a simulation study	101
Recruitment methods and yield rates in a clinical trial of physical exercise for older adults with hypertension—HAEL Study: a study within a trial	89
How likely is unmeasured confounding to explain meta-analysis-derived associations between alcohol, other substances, and mood-related conditions with HIV risk behaviors?	88
Handling of missing component information for common composite score outcomes used in axial spondyloarthritis research when complete-case analysis is unbiased	87
External validation of existing dementia prediction models on observational health data	83
Statistical methods in the analysis of multicentre HIV randomized controlled trials in the African region: a scoping review	82
Choices of measures of association affect the visualisation and composition of the multimorbidity networks	71
Modelling of intensive care unit (ICU) length of stay as a quality measure: a problematic exercise	70
A Bayesian network perspective on neonatal pneumonia in pregnant women with diabetes mellitus	67
Developing survey weights to ensure representativeness in a national, matched cohort study: results from the children and young people with Long Covid (CLoCk) study	65
MetaAnalyst: a user-friendly tool for metagenomic biomarker detection and phenotype classification	58
Design and analysis of outcomes following SARS-CoV-2 infection in veterans	57
A framework to model global, regional, and national estimates of intimate partner violence	56
The impact of iterative removal of low-information cluster-period cells from a stepped wedge design	56
Power and sample size calculation for incremental net benefit in cost effectiveness analyses with applications to trials conducted by the Canadian Cancer Trials Group	56

Contextual effects: how to, and how not to, quantify them	55
Estimation of marginal structural models under irregular visits and unmeasured confounder: calibrated inverse probability weights	54
Technologies for frailty, comorbidity, and multimorbidity in older adults: a systematic review of research designs	54
CalScope: methodology and lessons learned for conducting a remote statewide SARS-CoV-2 seroprevalence study in California using an at-home dried blood spot collection kit and online survey	52
Clinical systematic reviews – a brief overview	51
A data-driven pipeline to extract potential adverse drug reactions through prescription, procedures and medical diagnoses analysis: application to a cohort study of 2,010 patients taking hydroxychloro	50
Causal effect of chemotherapy received dose intensity on survival outcome: a retrospective study in osteosarcoma	49
Using group testing in a two-phase epidemiologic design to identify the effects of a large number of antibody reactions on disease risk	45
Methodological aspects for accelerometer-based assessment of physical activity in heart failure and health	45
Open science saves lives: lessons from the COVID-19 pandemic	45
Joint modelling of multivariate longitudinal clinical laboratory safety outcomes, concomitant medication and clinical adverse events: application to artemisinin-based treatment during pregnancy clinic	44
An algorithm to assess importance of predictors in systematic reviews of prediction models: a case study with simulations	44
Analytical challenges in estimating the effect of exposures that are bounded by follow-up time: experiences from the Blood Stream Infection—Focus on Outcomes study	42
The reliance on conceptual frameworks in qualitative research – a way forward	42
The effect of high prevalence of missing data on estimation of the coefficients of a logistic regression model when using multiple imputation	42
A study within a trial (SWAT) of clinical trial feasibility and barriers to recruitment in the United Kingdom – the CapaCiTY programme experience	41
Assessing and adjusting for bias in ecological analysis using multiple sample datasets	41