OOIR: Observatory of International Research

Papers

(The H4-Index of BMC Medical Research Methodology is 39. 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 2022-01-01 to 2026-01-01.)

Article	Citations
Estimation of marginal structural models under irregular visits and unmeasured confounder: calibrated inverse probability weights	354
Handling of missing component information for common composite score outcomes used in axial spondyloarthritis research when complete-case analysis is unbiased	281
Correction: In health research publications, the number of authors is strongly associated with collective self-citations but less so with citations by others	126
A Bayesian network perspective on neonatal pneumonia in pregnant women with diabetes mellitus	118
Statistical methods in the analysis of multicentre HIV randomized controlled trials in the African region: a scoping review	99
The role and challenges of clinical research coordinators: insights from a national survey	98
A randomized Bayesian phase I-II dose optimization design for combination cancer therapies with progression-free survival end point	97
Towards robust electronic health record systems: integrating formal verification and process modeling techniques	95
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	89
Should RECOVERY have used response adaptive randomisation? Evidence from a simulation study	84
Clinical systematic reviews – a brief overview	79
Estimating comparative effectiveness using Single-Arm trials: A challenge in the field of agnosticism	78
Design and analysis of outcomes following SARS-CoV-2 infection in veterans	76
Modelling of intensive care unit (ICU) length of stay as a quality measure: a problematic exercise	76
regCOVID: Tracking publications of registered COVID-19 studies	74
How likely is unmeasured confounding to explain meta-analysis-derived associations between alcohol, other substances, and mood-related conditions with HIV risk behaviors?	74
Causal effect of chemotherapy received dose intensity on survival outcome: a retrospective study in osteosarcoma	71
Does imbalance in chest X-ray datasets produce biased deep learning approaches for COVID-19 screening?	69
MetaAnalyst: a user-friendly tool for metagenomic biomarker detection and phenotype classification	64
Recruitment methods and yield rates in a clinical trial of physical exercise for older adults with hypertension—HAEL Study: a study within a trial	64
Technologies for frailty, comorbidity, and multimorbidity in older adults: a systematic review of research designs	59
Could master protocols be adapted for effectiveness-implementation hybrid studies?	59
Choices of measures of association affect the visualisation and composition of the multimorbidity networks	59
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	58
Developing survey weights to ensure representativeness in a national, matched cohort study: results from the children and young people with Long Covid (CLoCk) study	56

A gated group sequential design for seamless Phase II/III trial with subpopulation selection	56
More than one third of clinical practice guidelines on low back pain overlap in AGREE II appraisals. Research wasted?	55
Improving the efficiency of drug resistant tuberculosis treatment trials: a time-to-event alternative marker for bacteriological response and adaptive minimization for randomization	51
Comparing statistical methods in assessing the prognostic effect of biomarker variability on time-to-event clinical outcomes	48
The impact of iterative removal of low-information cluster-period cells from a stepped wedge design	47
Understanding facilitators of research participation among adults with self-reported chronic pain – a survey examining hypothetical research participation	47
Contextual effects: how to, and how not to, quantify them	46
Recruitment of a probability-based general population health panel for public health research in Germany: the panel ‘Health in Germany’	45
A framework to model global, regional, and national estimates of intimate partner violence	45
Mind the gap: covariate constrained randomisation can protect against substantial power loss in parallel cluster randomised trials	44
Power and sample size calculation for incremental net benefit in cost effectiveness analyses with applications to trials conducted by the Canadian Cancer Trials Group	43
External validation of existing dementia prediction models on observational health data	41
Using group testing in a two-phase epidemiologic design to identify the effects of a large number of antibody reactions on disease risk	40
Fidelity, pragmatism and the “grey line” in between—exploring the delivery of a pragmatic physical activity randomised controlled trial—a secondary analysis	39