The connection between mechanistic, interventional, and implementation studies forms the backbone of the epistemological positioning of the NPIS Model regarding the evaluation of NPI. This does not mean that an interventional study, for example, cannot explore biological mechanisms or psychosocial processes. Instead, this backbone provides coherence to the studies and structures the validation process of NPI for integration into a standardized practice framework.

NPI are protocols to be implemented with a target population, but they are merely specifications. They must be contextualized and personalized. The NPI Registry offers best practices and tips for optimal implementation. Furthermore, the NPIS recommends interdisciplinary training in health ethics for their application. The scientific society works with its partners to develop and recognize this foundational training, which could be conducted particularly in higher education institutions in collaboration with the Ministry of Health. This ethical training includes all the prerequisites of knowledge, skills, and attitudes necessary for interprofessional practice in health. Health professionals with practical experience, such as doctors, will have equivalencies.

PSYCHOSOCIAL DOMINANCE

Psychotherapies:

• Cognitive Stimulation Therapy for memory strategies in Alzheimer’s disease in 14 sessions by a psychologist in a healthcare facility, health center, or private practice.
• Mindfulness Based Stress Reduction (MBSR-BC) program against anxiety during cancer treatments in 8 group sessions by a clinical psychologist, psychiatrist, or physician in an oncology department, a patient association, a private practice, a health center, or a healthcare facility.
• Acceptance and Commitment Therapy for chronic pain in 9 group sessions by a clinical psychologist or psychiatrist in a healthcare facility, health center, or private practice.
• Cognitive Behavioral Therapy for Insomnia (CBT-I) in 6-8 individual sessions, either remote or in-person, by a neuropsychologist, clinical psychologist, psychiatrist, or neurologist in a healthcare facility, health center, or private practice.
• Now I Can Do Heights program using virtual reality to treat acrophobia (fear of heights) by a clinical psychologist or psychiatrist in a private practice or health center.

Health Prevention Programs:

• Living Well with COPD therapeutic education program against symptoms and exacerbations of COPD over 2 months with 4 sessions, in-person or remote, by a nurse, physician, or pharmacist in a healthcare facility, health center, or private practice.
• CHESS Method (Chronic Headache Education and Self-management) for migraine self-management by a nurse or physician in a healthcare facility, health center, or private practice.
• MyFriend Youth Program for preventing anxiety and depression among students aged 12 to 15 years, 10 sessions by a school psychologist or school nurse in an educational institution.
• Spiegel Hypnotherapy Method specialized in smoking cessation in 3 sessions by a psychologist, nurse, physician, or hypnotherapist in a private practice, healthcare facility, health center, or private practice.
• Cognitive Behavioral Therapy for Depression (CBT-d) by a clinical psychologist or psychiatrist in a healthcare facility, health center, or private practice.

CORPOREAL DOMINANCE

Physiotherapy Protocols:

• McKenzie Method for back pain by a physiotherapist in a healthcare facility, health center, or private practice.
• Pelvic Floor Muscle Training (PFMT) program by a midwife or physiotherapist in a health center or private practice.
• Rehabilitation program following hip prosthesis in 6 to 10 sessions by a physiotherapist in a healthcare facility, health center, or private practice.

Adapted Physical Activity Programs:

• Dance Therapy for Parkinson’s Disease addressing psychological symptoms of Parkinson’s by a physical activity instructor in a healthcare facility, health center, or private practice.
• Re-exercise program at ventilatory threshold against dyspnea caused by COPD by a physical activity instructor or physiotherapist in a healthcare facility, health center, or private practice.
• Anti-fatigue APA program during treatments for breast, prostate, or colon cancer by a physical activity instructor in a healthcare facility, health center, or private practice.

Thermal Treatments:

• Specialized thermal cure for gonarthrosis by a physiotherapist or thermal agent in a thermal facility.

NUTRITIONAL DOMINANCE

• Gluten-free diet for celiac disease by a dietitian in a healthcare facility, health center, or private practice.
• FODMAP diet for gastrointestinal disorders by a dietitian in a healthcare facility, health center, or private practice.

Each NPI file in the NPI Registry has been submitted by a practitioner or researcher through the dedicated platform hosted by the NPIS. Each file undergoes review by an independent and integrated scientific committee. This committee invites relevant scientific societies and health authorities to validate the NPI files and/or to oversee the decisions made. Each validated file is then reviewed by a committee of users and professionals. Once labeled NPIS©, the file is translated into at least English and French and integrated into the NPI Registry.

The file contains standardized content supported by scientific studies that align with the NPIS definition of NPI, the expected specifications (Table 2), and the consensual evaluation framework for NPI, known as the NPIS Model. It includes a manual for professionals, an information notice for users, a section on funding options, and an area for anonymous user feedback. This ensures the file remains dynamic and part of a virtuous cycle of continuous improvement for the NPI.

A minimum of one prototypical study, one mechanistic study, two interventional studies, and one implementation study published in a peer-reviewed journal is required for an NPI proposal to be accepted by the expert committee tasked with validating the NPI file and awarding the NPIS© label. Specifically, experts must have evidence to anonymously vote on each criterion of the NPI file proposed to the NPIS by a submitter:

• Described (≥ 1 prototypical study)
• Explainable (≥ 1 mechanistic study)
• Effective (≥ 2 interventional studies)
• Safe (≥ 2 interventional studies)
• Implementable (≥ 1 implementation study in the country)

A professional must understand all the specifics of the NPI, the criteria justifying its use, how to implement its protocol, whom to contact, useful tips, required materials, and any prerequisite training needed.