OOIR: Observatory of International Research

Papers

(The H4-Index of BMC Medical Research Methodology is 40. 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 2021-05-01 to 2025-05-01.)

Article	Citations
Mind the gap: covariate constrained randomisation can protect against substantial power loss in parallel cluster randomised trials	399
Does imbalance in chest X-ray datasets produce biased deep learning approaches for COVID-19 screening?	386
Estimation of marginal structural models under irregular visits and unmeasured confounder: calibrated inverse probability weights	283
coreSCD: multi-stakeholder consensus on core outcomes for sickle cell disease clinical trials	228
regCOVID: Tracking publications of registered COVID-19 studies	171
Technologies for frailty, comorbidity, and multimorbidity in older adults: a systematic review of research designs	160
A gated group sequential design for seamless Phase II/III trial with subpopulation selection	155
Comparing statistical methods in assessing the prognostic effect of biomarker variability on time-to-event clinical outcomes	113
Understanding facilitators of research participation among adults with self-reported chronic pain – a survey examining hypothetical research participation	112
Correction: In health research publications, the number of authors is strongly associated with collective self-citations but less so with citations by others	98
Pre-statistical harmonization of behavioral instruments across eight surveys and trials	97
Clinical systematic reviews – a brief overview	84
More than one third of clinical practice guidelines on low back pain overlap in AGREE II appraisals. Research wasted?	84
Should RECOVERY have used response adaptive randomisation? Evidence from a simulation study	83
Recruitment methods and yield rates in a clinical trial of physical exercise for older adults with hypertension—HAEL Study: a study within a trial	80
How likely is unmeasured confounding to explain meta-analysis-derived associations between alcohol, other substances, and mood-related conditions with HIV risk behaviors?	76
Handling of missing component information for common composite score outcomes used in axial spondyloarthritis research when complete-case analysis is unbiased	73
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	68
External validation of existing dementia prediction models on observational health data	68
Statistical methods in the analysis of multicentre HIV randomized controlled trials in the African region: a scoping review	68
Design and analysis of outcomes following SARS-CoV-2 infection in veterans	62
Power and sample size calculation for incremental net benefit in cost effectiveness analyses with applications to trials conducted by the Canadian Cancer Trials Group	61
Choices of measures of association affect the visualisation and composition of the multimorbidity networks	58
Causal effect of chemotherapy received dose intensity on survival outcome: a retrospective study in osteosarcoma	55
Modelling of intensive care unit (ICU) length of stay as a quality measure: a problematic exercise	55

Developing survey weights to ensure representativeness in a national, matched cohort study: results from the children and young people with Long Covid (CLoCk) study	54
A Bayesian network perspective on neonatal pneumonia in pregnant women with diabetes mellitus	54
MetaAnalyst: a user-friendly tool for metagenomic biomarker detection and phenotype classification	52
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	51
Classifying information-sharing methods	51
Methodological aspects for accelerometer-based assessment of physical activity in heart failure and health	50
The impact of iterative removal of low-information cluster-period cells from a stepped wedge design	49
Contextual effects: how to, and how not to, quantify them	46
Open science saves lives: lessons from the COVID-19 pandemic	44
A framework to model global, regional, and national estimates of intimate partner violence	44
Using group testing in a two-phase epidemiologic design to identify the effects of a large number of antibody reactions on disease risk	43
Identifying Potential Factors Associated with High HIV viral load in KwaZulu-Natal, South Africa using Multiple Correspondence Analysis and Random Forest Analysis	43
Joint modelling of multivariate longitudinal clinical laboratory safety outcomes, concomitant medication and clinical adverse events: application to artemisinin-based treatment during pregnancy clinic	43
Reporting of methods to prepare, pilot and perform data extraction in systematic reviews: analysis of a sample of 152 Cochrane and non-Cochrane reviews	42
An algorithm to assess importance of predictors in systematic reviews of prediction models: a case study with simulations	41
The reliance on conceptual frameworks in qualitative research – a way forward	40