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 2021-10-01 to 2025-10-01.)

Article	Citations
Understanding facilitators of research participation among adults with self-reported chronic pain – a survey examining hypothetical research participation	350
Comparing statistical methods in assessing the prognostic effect of biomarker variability on time-to-event clinical outcomes	312
A gated group sequential design for seamless Phase II/III trial with subpopulation selection	233
Estimation of marginal structural models under irregular visits and unmeasured confounder: calibrated inverse probability weights	215
Recruitment methods and yield rates in a clinical trial of physical exercise for older adults with hypertension—HAEL Study: a study within a trial	132
External validation of existing dementia prediction models on observational health data	110
Handling of missing component information for common composite score outcomes used in axial spondyloarthritis research when complete-case analysis is unbiased	107
Correction: In health research publications, the number of authors is strongly associated with collective self-citations but less so with citations by others	89
A Bayesian network perspective on neonatal pneumonia in pregnant women with diabetes mellitus	84
Statistical methods in the analysis of multicentre HIV randomized controlled trials in the African region: a scoping review	78
Technologies for frailty, comorbidity, and multimorbidity in older adults: a systematic review of research designs	77
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	73
The impact of iterative removal of low-information cluster-period cells from a stepped wedge design	72
Should RECOVERY have used response adaptive randomisation? Evidence from a simulation study	71
Choices of measures of association affect the visualisation and composition of the multimorbidity networks	70
Mind the gap: covariate constrained randomisation can protect against substantial power loss in parallel cluster randomised trials	68
Power and sample size calculation for incremental net benefit in cost effectiveness analyses with applications to trials conducted by the Canadian Cancer Trials Group	66
Clinical systematic reviews – a brief overview	65
Does imbalance in chest X-ray datasets produce biased deep learning approaches for COVID-19 screening?	65
Causal effect of chemotherapy received dose intensity on survival outcome: a retrospective study in osteosarcoma	64
Contextual effects: how to, and how not to, quantify them	64
A framework to model global, regional, and national estimates of intimate partner violence	60
Design and analysis of outcomes following SARS-CoV-2 infection in veterans	59
A randomized Bayesian phase I-II dose optimization design for combination cancer therapies with progression-free survival end point	58
Towards robust electronic health record systems: integrating formal verification and process modeling techniques	55

coreSCD: multi-stakeholder consensus on core outcomes for sickle cell disease clinical trials	53
MetaAnalyst: a user-friendly tool for metagenomic biomarker detection and phenotype classification	52
Pre-statistical harmonization of behavioral instruments across eight surveys and trials	52
Developing survey weights to ensure representativeness in a national, matched cohort study: results from the children and young people with Long Covid (CLoCk) study	51
How likely is unmeasured confounding to explain meta-analysis-derived associations between alcohol, other substances, and mood-related conditions with HIV risk behaviors?	51
regCOVID: Tracking publications of registered COVID-19 studies	50
Methodological aspects for accelerometer-based assessment of physical activity in heart failure and health	50
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	49
Modelling of intensive care unit (ICU) length of stay as a quality measure: a problematic exercise	49
More than one third of clinical practice guidelines on low back pain overlap in AGREE II appraisals. Research wasted?	48
Using group testing in a two-phase epidemiologic design to identify the effects of a large number of antibody reactions on disease risk	46
Joint modelling of multivariate longitudinal clinical laboratory safety outcomes, concomitant medication and clinical adverse events: application to artemisinin-based treatment during pregnancy clinic	44
Fidelity, pragmatism and the “grey line” in between—exploring the delivery of a pragmatic physical activity randomised controlled trial—a secondary analysis	42
Measuring bereavement prevalence in a complex sampling survey: the 2019 Georgia Behavioral Risk Factor Surveillance System (BRFSS)	40
Methodology and experiences of rapid advice guideline development for children with COVID-19: responding to the COVID-19 outbreak quickly and efficiently	40
Optimising research investment by simulating and evaluating monitoring strategies to inform a trial: a simulation of liver fibrosis monitoring	40
Cause of death coding in asthma	40