From:  Standardizing infrared thermography for occupational applications: an integrative narrative review of protocol quality, thermal metrics, and multimodal integration in work-related musculoskeletal disorders

 Domains and variables used for data extraction.

DomainVariables/Description
Study identification and bibliographic metadataStudy identifier (study_id), title, abstract, year, DOI, PMID, journal, and authors (as indexed).
Source and provenanceRetrieval source (source_db), contributing sources within cluster (sources), file provenance (files), and snowball presence flag (has_snowball).
Study designStudy design and analytic design (e.g., observational/experimental; cross-sectional/longitudinal; presence of comparator and/or follow-up) (study_design).
Population and occupational contextPopulation and occupational context (occupation/sector, predominant task/exposure, and inclusion/exclusion criteria when reported) (population_occupation).
Anatomic region/ROIAnatomic region assessed and region-of-interest definition/segmentation, including laterality when reported (body_region).
Conditions/WMSD focusTarget condition, case definition, or WMSD-related construct assessed (condition_wmsd).
Comparators/reference measuresComparator and/or reference assessments used (e.g., clinical examination, questionnaires, other imaging or physiologic measures) (comparator_reference).
IRT device characteristicsIRT device model/specifications when reported (irt_device).
IRT acquisition protocolKey acquisition/protocol elements (environmental control, acclimatization, distance/angle, emissivity/calibration, static/dynamic procedures, pre/post task) (protocol_key_points).
MultimodalityComplementary modalities integrated with IRT (sEMG, strength/dynamometry, ultrasonography with/without Doppler, PROs) (multimodal_components).
Outcomes and measuresThermal and non-thermal outcomes/measures extracted (e.g., absolute temperature, asymmetry, task-induced ΔT, gradients, recovery kinetics; statistical endpoints when reported) (outcomes_measures).
Key findings and limitationsSummary of principal results (direction/magnitude) and reported limitations, bias/confounding considerations, and reproducibility/QC notes (key_findings; limitations_bias_notes).

PROs: patient-reported outcomes; ROI: regions of interest; sEMG: surface electromyography; WMSD: work-related musculoskeletal disorder; ΔT: temperature difference; DOI: Digital Object Identifier; PMID: PubMed identifier; QC: Quality Control.