Clinical Data Collection Standards for SCD Programs
Define your SCD program's data dictionary, coding standards, validation rules, and quality targets to ensure reliable, interoperable clinical data.
Chapter 1.Data Dictionary
A data dictionary defines every data element: field name, data type, description, allowable values, required/optional status, and data source. For SCD tracking, cover patient demographics, clinical encounters (date, type, facility, provider), vital signs, laboratory results (hemoglobin, HbF, MCV, WBC, ANC, platelets, reticulocyte count, creatinine, bilirubin), medications (drug, dose, frequency, dates, adherence), complications, and outcomes.
Tracka ships with a pre-built dictionary aligned with international SCD clinical guidelines, extensible with custom fields for local requirements. This ensures a common baseline supporting data comparability across deployments.
Chapter 2.Coding Standards
Standardized coding ensures consistent recording and interoperability. Key standards include ICD-10 for diagnoses (D57.0 HbSS with crisis, D57.1 without crisis, D57.2 HbSC, D57.3 trait), LOINC for laboratory observations, SNOMED CT for clinical terminology, and RxNorm for medications. At minimum, diagnosis and medication data should use standardized codes.
Tracka maps its internal data model to ICD-10, LOINC, and RxNorm, enabling interoperable data export even when users interact with simplified, context-appropriate interfaces that abstract coding complexity.
Chapter 3.Validation Rules
Validation rules prevent errors at capture: range checks (hemoglobin 2.0-20.0 g/dL, weight 0.5-200 kg), format checks (date formats, phone digit counts), logical consistency checks (visit date after birth date, discharge after admission), and conditional requirements (if acute visit, chief complaint required). Cross-field rules add clinical decision support — a hydroxyurea dose exceeding the maximum for the patient's weight triggers a warning.
Categorize rules as hard constraints (prevent saving) versus soft warnings (flag but allow saving). Reserve hard constraints for clearly impossible values. Overusing them leads to workarounds like fabricated data.
Chapter 4.Completeness Targets
Recommended targets: 100% for patient identification fields, 95%+ for clinical encounter fields, 90%+ for laboratory results (not always available every visit), 85%+ for medication adherence assessments. Monitor at individual, facility, and program levels with regular feedback to data collectors.
Completeness alone is insufficient — a field populated with incorrect data is worse than blank. Complement completeness monitoring with periodic accuracy audits verifying recorded values against source documents or patient re-assessment.
Chapter 5.Quality Assurance
A comprehensive QA program includes prospective controls (validation rules, required fields, training), concurrent monitoring (real-time dashboards, automated outlier alerts), and retrospective review (periodic audits, random verification against source documents). Quality review meetings should be weekly at facility level, monthly at district level, quarterly at program level.
Tracka provides built-in quality dashboards calculating completeness scores, flagging accuracy issues through outlier detection, tracking timeliness relative to visit dates, and identifying patterns by agent, facility, or region. These enable proactive intervention before issues compound.
Chapter 6.Common Errors
Frequent errors include duplicate registrations (same patient with name variations), genotype misclassification (HbSS vs. HbSB0, HbAS vs. HbSS), unit errors in lab values (80 vs. 8.0 hemoglobin from different reporting units), backdated visits (recall errors from delayed entry), and medication errors (confusing mg and mg/kg, failing to update changed doses, inaccurate adherence assessment).
Prevention strategies: deduplication algorithms at registration, dropdown genotype selection instead of free-text, automatic unit conversion and range validation, GPS timestamping of visits, and structured adherence tools. Tracka incorporates all of these in its standard configuration.