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Identifying potentially eligible subjects for research: paper-based logs versus the hospital administrative database
L A Magee1, K Massey, P von Dadelszen
1Department of Medicine, Child and Family Research Institute, Vancouver, British Columbia, Canada. LMagee@cw.bc.ca
Chronic Diseases and Injuries in Canada
|December 14, 2011
Summary
Comparing patient identification methods for the Canadian Perinatal Network (CPN), electronic searches of the Canadian Institute for Health Information (CIHI) database were faster than traditional ward logs for identifying women with threatened very preterm birth.
Area of Science:
- Perinatal research
- Clinical data management
- Public health surveillance
Background:
- The Canadian Perinatal Network (CPN) collects data on threatened very preterm births.
- Inclusion criteria involve specific gestational ages (22 0/7 to 28 6/7 weeks) and maternal conditions.
- Accurate patient identification is crucial for database completeness.
Purpose of the Study:
- To compare the efficiency of two methods for identifying eligible patients for the CPN.
- To evaluate traditional paper-based ward logs against electronic searches of the Canadian Institute for Health Information (CIHI) database.
Main Methods:
- A retrospective comparison of patient identification methods was conducted at BC Women's Hospital and Health Centre.
- Paper-based ward logs were compared with searches of the CIHI inpatient discharge database.
- Patient eligibility was based on gestational age criteria for threatened very preterm birth.
Main Results:
- Both ward logs and CIHI searches identified eligible patients for the CPN.
- The CIHI search identified more unique records (147) compared to ward logs (142).
- CIHI searches were significantly faster (0.67 hours) and reviewed fewer records (206) than ward logs (13.6 hours, 223 records).
Conclusions:
- Both ward logs and CIHI searches are appropriate for identifying research subjects using gestational age criteria.
- Electronic methods (CIHI) are more time-efficient but require post-discharge data availability.
- The choice of method depends on project-specific needs and resource availability.
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