Evaluating the comparability of patient-level social risk data extracted from electronic health records: A systematic scoping review.

To evaluate how and from where social risk data are extracted from EHRs for research purposes, and how observed differences may impact study generalizability. Systematic scoping review of peer-reviewed literature that used patient-level EHR data to assess 1 ± 6 social risk domains: housing, transportation, food, utilities, safety, social support/isolation. 111/9022 identified articles met inclusion criteria. By domain, social support/isolation was most often included ( = 68/111), predominantly defined by marital/partner status ( = 48/68) and extracted from structured sociodemographic data ( = 45/48). Housing risk was defined primarily by homelessness ( = 39/49). Structured housing data was extracted most from billing codes and screening tools ( = 15/30, 13/30, respectively). Across domains, data were predominantly sourced from structured fields ( = 89/111) versus unstructured free text ( = 32/111). We identified wide variability in how social domains are defined and extracted from EHRs for research. More consistency, particularly in how domains are operationalized, would enable greater insights across studies.