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 2022-07-01 to 2026-07-01.)

Article	Citations
Estimation of marginal structural models under irregular visits and unmeasured confounder: calibrated inverse probability weights	455
A Bayesian network perspective on neonatal pneumonia in pregnant women with diabetes mellitus	360
Statistical methods in the analysis of multicentre HIV randomized controlled trials in the African region: a scoping review	214
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	182
Technologies for frailty, comorbidity, and multimorbidity in older adults: a systematic review of research designs	173
Clinical systematic reviews – a brief overview	120
How likely is unmeasured confounding to explain meta-analysis-derived associations between alcohol, other substances, and mood-related conditions with HIV risk behaviors?	113
Comparing statistical methods in assessing the prognostic effect of biomarker variability on time-to-event clinical outcomes	113
Could master protocols be adapted for effectiveness-implementation hybrid studies?	103
regCOVID: Tracking publications of registered COVID-19 studies	103
Choices of measures of association affect the visualisation and composition of the multimorbidity networks	102
Correction: In health research publications, the number of authors is strongly associated with collective self-citations but less so with citations by others	102
Should RECOVERY have used response adaptive randomisation? Evidence from a simulation study	101
Estimating comparative effectiveness using Single-Arm trials: A challenge in the field of agnosticism	90
Improving the efficiency of drug resistant tuberculosis treatment trials: a time-to-event alternative marker for bacteriological response and adaptive minimization for randomization	85
Power and sample size calculation for incremental net benefit in cost effectiveness analyses with applications to trials conducted by the Canadian Cancer Trials Group	82
Handling of missing component information for common composite score outcomes used in axial spondyloarthritis research when complete-case analysis is unbiased	82
Towards robust electronic health record systems: integrating formal verification and process modeling techniques	82
The impact of iterative removal of low-information cluster-period cells from a stepped wedge design	73
More than one third of clinical practice guidelines on low back pain overlap in AGREE II appraisals. Research wasted?	66
Modelling of intensive care unit (ICU) length of stay as a quality measure: a problematic exercise	65
MetaAnalyst: a user-friendly tool for metagenomic biomarker detection and phenotype classification	62
A gated group sequential design for seamless Phase II/III trial with subpopulation selection	59
Developing survey weights to ensure representativeness in a national, matched cohort study: results from the children and young people with Long Covid (CLoCk) study	55
Design and analysis of outcomes following SARS-CoV-2 infection in veterans	54

Causal effect of chemotherapy received dose intensity on survival outcome: a retrospective study in osteosarcoma	53
Understanding facilitators of research participation among adults with self-reported chronic pain – a survey examining hypothetical research participation	53
A randomized Bayesian phase I-II dose optimization design for combination cancer therapies with progression-free survival end point	52
Contextual effects: how to, and how not to, quantify them	48
Comparing methods for handling missing data in electronic health records for dynamic risk prediction of central-line associated bloodstream infection	48
The role and challenges of clinical research coordinators: insights from a national survey	48
External validation of existing dementia prediction models on observational health data	47
Fidelity, pragmatism and the “grey line” in between—exploring the delivery of a pragmatic physical activity randomised controlled trial—a secondary analysis	44
Discretizing multiple continuous predictors with U-shaped relationships with lnOR: introducing the recursive gradient scanning method in clinical and epidemiological research	44
Using group testing in a two-phase epidemiologic design to identify the effects of a large number of antibody reactions on disease risk	44
Development and validation of paired MEDLINE and Embase search filters for cost-utility studies	44
Recruitment of a probability-based general population health panel for public health research in Germany: the panel ‘Health in Germany’	44
Measuring bereavement prevalence in a complex sampling survey: the 2019 Georgia Behavioral Risk Factor Surveillance System (BRFSS)	44
A study within a trial (SWAT) of clinical trial feasibility and barriers to recruitment in the United Kingdom – the CapaCiTY programme experience	41
An algorithm to assess importance of predictors in systematic reviews of prediction models: a case study with simulations	40