Study guide
16.1 Source Documentation Standards (ALCOA-C)
Certified Clinical Research Coordinator CCRC
Track your progress as you read
Finished sections get a check mark.
1 Chapter 1: Scientific Concepts and Research Design
1.1 Protocol Elements 1.2 Study Design and Objectives 1.3 Study Endpoints and Biostatistics
2 Chapter 2: Ethical Principles and Guidelines
2.1 Ethical Principles (Declaration of Helsinki, Belmont Report) 2.2 Informed Consent Process and Documentation 2.3 Vulnerable Populations and Assent
3 Chapter 3: IRB/IEC Oversight and Participant Safety
3.1 IRB/IEC Functions and Oversight 3.2 Adverse Event Classification and Reporting 3.3 Safety Monitoring and Safety Reporting
4 Chapter 4: Participant Rights and Ethics
4.1 Participant Rights and Confidentiality (HIPAA/GDPR) 4.2 Conflicts of Interest 4.3 Ethical Scenarios in Clinical Trials
5 Chapter 5: Product Development and Regulatory Framework
5.1 Drug and Device Development Phases 5.2 U.S. and International Regulatory Frameworks 5.3 Investigational Product Investigator's Brochure (IB)
6 Chapter 6: Investigational Product Accountability
6.1 Investigational Product Labeling and Storage 6.2 Investigational Product Receipt, Dispensing, and Accountability 6.3 Investigational Product Return and Destruction
7 Chapter 7: Regulatory Submissions and Actions
7.1 Regulatory Submissions (IND, NDA, IDE, PMA) 7.2 Regulatory Actions and Compliance 7.3 Pharmacokinetics and Pharmacodynamics in Product Development
8 Chapter 8: Clinical Trial Operations and GCP Principles
8.1 Introduction to ICH E6 GCP Principles (including R3 updates) 8.2 Investigator Responsibilities under GCP 8.3 Sponsor Responsibilities and Oversight
9 Chapter 9: Essential Documents and Site Qualification
9.1 Essential Documents (Pre-study, During, Post-study) 9.2 Site Selection and Qualification 9.3 Quality Management and Standard Operating Procedures (SOPs)
10 Chapter 10: Protocol Deviations and Amendments
10.1 Protocol Adherence and Compliance 10.2 Protocol Deviations and Violations 10.3 Protocol Amendments and Version Control
11 Chapter 11: Monitoring Visits and Audits
11.1 Monitoring Preparation and Visit Types 11.2 Monitoring Visits (SIV, IMV, COV) 11.3 Regulatory Inspections and Site Audits
12 Chapter 12: Study and Site Management - Startup
12.1 Site Startup Operations 12.2 Site Budget and Contract Management 12.3 Site Staffing, Training, and Documentation
13 Chapter 13: Enrollment and Recruitment
13.1 Enrollment Management and Strategies 13.2 Participant Recruitment and Retention 13.3 Participant Compensation and Ethics
14 Chapter 14: Daily Trial Coordination
14.1 Visit Scheduling and Logistics 14.2 Equipment Maintenance and Calibration 14.3 Specimen Handling and Shipping (IATA/dangerous goods)
15 Chapter 15: Quality Improvement and Site Closeout
15.1 Participant Safety Management 15.2 Quality Improvement and Site Audits Preparation 15.3 Study and Site Closeout Procedures
16 Chapter 16: Source Documentation and Case Report Forms
16.1 Source Documentation Standards (ALCOA-C) 16.2 Case Report Forms and eCRF Completion 16.3 Electronic Data Capture (EDC) Systems
17 Chapter 17: Data Management and Queries
17.1 Data Management Processes 17.2 Data Queries and Discrepancy Resolution 17.3 Data Correction and Audit Trails
18 Chapter 18: Data Privacy and Records Retention
18.1 Data Privacy and Confidentiality 18.2 Records Retention and Archiving 18.3 Compliance in Clinical Trial Informatics
16.1 Source Documentation Standards (ALCOA-C)
Key Takeaways Explain This Topic AI
Source documents are the original records where clinical data is first recorded and are critical for trial reconstruction.
ALCOA-C stands for Attributable, Legible, Contemporaneous, Original, Accurate, and Complete.
Corrections to paper records must use a single strike-through, initial, and date; white-out is strictly prohibited.
Data must be recorded contemporaneously (in real-time); late entries must be dated with the current date, not backdated.
- The mindset of a clinical research professional should be: 'If it wasn't documented, it wasn't done.'
- Last updated: October 2026
Source Documentation Standards (ALCOA-C)
In clinical research, the integrity of a trial relies entirely on the quality and reliability of its data. This reliance makes source documentation one of the most critical aspects of trial conduct. According to the International Council for Harmonisation of Technical Requirements for Pharmaceuticals for Human Use (ICH) Good Clinical Practice (GCP) guidelines, source data refers to all information in original records and certified copies of original records of clinical findings, observations, or other activities in a clinical trial necessary for the reconstruction and evaluation of the trial.
Source documents are where source data is first recorded. These can include hospital records, clinical and office charts, laboratory notes, memoranda, subjects' diaries or evaluation checklists, pharmacy dispensing records, recorded data from automated instruments, copies or transcriptions certified after verification as being accurate and complete, microfiches, photographic negatives, microfilm or magnetic media, x-rays, subject files, and records kept at the pharmacy, at the laboratories, and at medico-technical departments involved in the clinical trial.
The ALCOA, ALCOA-C and ALCOA+ Principles
To ensure that source documentation is reliable, ICH E6(R3) (section 2.12.2) states that source records should be attributable, legible, contemporaneous, original, accurate and complete. The original acronym ALCOA stands for Attributable, Legible, Contemporaneous, Original, and Accurate; adding Complete gives ALCOA-C, the six attributes E6(R3) names. ALCOA+, the set listed in ACRP's CCRC content outline, adds Consistent, Enduring and Available to those six, for nine attributes.
1. Attributable
Attributable means that any data generated or collected must be traceable to the person who recorded it. It should also be clear when the data was collected and who the subject is.
Paper Records: This is typically achieved through signatures, initials, and dates on paper forms. A site delegation log is used to match initials/signatures to specific personnel and ensure they were authorized to perform the task.
Electronic Records: In Electronic Health Records (EHR) or Electronic Data Capture (EDC) systems, traceability is maintained through unique, individualized user logins and secure passwords, combined with an automatic, computer-generated audit trail. Passwords must never be shared.
Real-World Example: A Clinical Research Coordinator (CRC) takes a subject's blood pressure. The CRC must write their initials and the date next to the blood pressure reading in the source document. If an auditor reviews the chart three years later, they can use the site delegation log to confirm that the CRC who took the reading was appropriately trained and authorized by the Principal Investigator (PI).
2. Legible
Legible means the data must be readable. This applies not only to the initial entry but also to any subsequent corrections or changes.
Good Practices: Write clearly in dark ink (usually blue or black) that photocopies well.
Corrections: If an error is made, the CRC must draw a single line through the incorrect entry (so it remains visible), write the correct entry, and add their initials and the date. Depending on site policy, a brief reason for the change (e.g., "ME" for math error, "WE" for writing error) may be required.
Prohibited Practices: Never use correction fluid (white-out), correction tape, or multiple scribble lines that obscure the original entry. Pencils should never be used as the data can be erased and altered.
3. Contemporaneous
Contemporaneous documentation means the data is recorded at the time the observation or activity occurs. Relying on memory and writing notes days later is a severe GCP violation.
Real-Time Entry: If a subject reports a headache starting at 10:00 AM, this should be noted during the visit.
Late Entries: If a data point is genuinely missed and needs to be added later, it must be clearly marked as a "late entry." The entry should be dated with the current date, not backdated to the time of the event, and a justification for the delay should be provided.
- 4. Original
- Original means the first place the data is recorded. This first record is the "source."
Direct Data Entry: Sometimes, data is entered directly into an EDC system (e.g., an electronic Case Report Form) without prior paper documentation. In this case, the eCRF is the source document.
Certified Copies: If the original source document cannot be retained (for example, a subject brings an outside medical record, and the site needs a copy), a "certified copy" can be made. A member of the site staff must verify that the copy is an exact, complete, and legible representation of the original, then sign and date the copy to certify it. Transcribing data to a "cleaner" piece of paper destroys the originality of the record.
5. Accurate
Accurate means the data reflects the truth and is error-free. It should accurately describe what happened, when, and to whom.
Verification: Instruments used to collect data (e.g., scales, sphygmomanometers, thermometers, centrifuges) must be regularly calibrated and maintained according to the manufacturer's specifications to ensure accurate readings.
Consistency: The data must be consistent with other records. For example, if the source notes a subject took study medication at 9:00 AM, but the site's visitor log shows the subject didn't arrive at the clinic until 10:30 AM, there is an accuracy issue.
6. Complete (ALCOA-C / ALCOA+)
Complete means all required data points are documented. There should be no blank spaces on forms where data is expected.
If a test was not performed, the source document should state "Not Done" (ND) rather than being left blank. A blank space creates ambiguity: was it forgotten, not done, or lost?
Complete also means the overall clinical picture is clear. A note that says "Subject is fine" is incomplete. A better note is: "Subject reports no new adverse events, concomitant medications reviewed and unchanged, vital signs within normal limits."
Other Additions (Consistent, Enduring, Available)
Consistent: Data elements agree with each other. Sequence of events should follow chronological order.
Enduring: Data must be recorded on media that lasts throughout the required retention period. Thermal paper (like some ECG printouts) fades over time and must be photocopied and certified to be enduring.
Available: Source documents must be readily available for review by CRAs (Monitors), auditors, and regulatory inspectors.
Clinical Trial Implications and Best Practices
When a Clinical Research Associate (CRA) performs Source Data Verification (SDV), they are confirming that the data in the Case Report Form (CRF) matches the source document and that the source adheres to ALCOA-C standards. If a site fails to maintain proper source documentation, the sponsor may reject the data, the FDA may issue an inspectional observation (Form 483), or the data may be deemed unreliable, potentially jeopardizing the approval of a new drug or device.
CRCs should adopt the mindset: "If it wasn't documented, it wasn't done." Training all site staff—from the Principal Investigator to the phlebotomist—on ALCOA-C is a fundamental responsibility of the CRC to ensure compliance and data integrity.