Protocol

A protocol is a document that outlines the objectives, design, methodology, and procedures for conducting a clinical trial while ensuring the integrity of the overall research process. Study protocols serve as reference documents for investigators, monitors, ethics committee members, regulatory authorities, and other stakeholders involved in the trial.

Definitions

ICH E6(R2)

1.44 Protocol:

A document that describes the objective(s), design, methodology, statistical considerations, and organization of a trial. The protocol usually also gives the background and rationale for the trial, but these could be provided in other protocol referenced documents. Throughout the ICH GCP Guideline the term protocol refers to protocol and protocol amendments .

Requirements for study protocol

Under 21 CFR 312.23(a)(6), the protocol must include the following mandatory requirements:

1. Objectives and purpose
   • a statement of the objectives and purpose of the study
2. Investigator information
   • name and address of each investigator
   • statement of qualifications (CV or equivalent) for each investigator
   • name of each subinvestigator working under the investigator (e.g., research fellow, resident)
   • name and address of research facilities to be used
   • name and address of each reviewing Institutional Review Board (IRB)
3. Patient selection
   • criteria for inclusion and exclusion of patients
   • estimated number of patients to be studied
4. Study Design
   • description of the study design
   • type of control group, if any
   • methods to minimize bias for subjects, investigators, and analysts
5. Dosing
   • method for determining dose(s)
   • planned maximum dosage
   • duration of individual patient exposure
6. Observations and measurements
   • description of observations and measurements to fulfill study objectives
7. Safety monitoring
   • clinical procedures, laboratory tests, or other measures to monitor drug effects and minimize risk to subjects

Protocol development

Protocols are typically developed by the study sponsor or principal investigator in collaboration with a multidisciplinary team of medicine scientists, clinicians, statisticians, and regulatory experts .

Typical structure of a clinical trial protocol

General information

• title of the study, and a unique identifier for the protocol
• information on sponsor/CRO/investigator
• protocol synopsis

Background and scientific rationale

• the need for trial conduct

Study objectives

• clear and specific statements outlining the primary and secondary objectives of the study

Study design

• type of study (e.g. randomized controlled trial, observational study), study phase, allocation of participants to different study groups
• definition of primary and secondary endpoints (i.e. outcome measures) used to assess the effectiveness and safety of the interventions
• definition of study population, this section contained inclusion and exclusion criteria
• descriptions of the investigational product(s), treatments, procedures, or interventions of study
• instructions for conducting of study, including participant recruitment, screening, randomization, treatment administration, follow-ups, and data collection procedures

Safety monitoring

• safety parameters
• monitoring of participant safety
• adverse event (including SAE, SUSAR, AE of special interest) reporting procedures
• measures to mitigate risks associated with the study interventions

Statistical analysis plan

• study hypotheses
• statistical methods and analyses planned to evaluate study outcomes and assess the significance of the results

Ethical considerations

• confirmation of compliance with ethical principles, regulatory requirements, and guidelines for the protection of human research participants
• protection of confidentiality and privacy of participant data throughout the study

Data management and quality assurance

• data collection, handling, and storage
• quality control to ensure the reliability and integrity of the study data

Publications

• publication policies

References

• relevant literature, regulatory documents, and guidelines that support the study design and methodology

Review and approval

Once finalized, protocols undergo review and approval by the relevant regulatory authority and institutional review boards or independent ethics committees to ensure regulatory compliance, as well as scientific and ethical conduct.

See also

Another relevant pages

• Investigator's Brochure

External links

• The SPIRIT Statement https://spirit-statement.org/spirit-statement/
• CONSORT 2010 Statement: updated guidelines for reporting parallel group randomised trials https://www.equator-network.org/reporting-guidelines/consort/