To assess the feasibility of conducting a larger cluster randomized controlled trial to facilitate the effectiveness of a complex Knowledge Translation (KT) intervention, i.e. implementation of multimodal care, into chiropractic clinical practice, designed to improve the management of patients with Non-Specific Neck Pain (NSNP) disorders.

To evaluate feasibility, the investigators will ascertain how well participating chiropractors and patients adhere to the study protocol and will solicit feedback from them about the overall usefulness of the content and format of the KT intervention. This study will determine planning for the main study and also the outcomes to be used as a primary outcome.

The aim of this pilot study project is to determine the feasibility of implementing a multifaceted KT intervention to promote the use of multimodal care by chiropractors managing patients with NSNP.

Design: Cluster randomized controlled pilot and feasibility trial. Chiropractors in private practice in Canada will be randomized to receive either a theory-based tailored KT intervention in the experimental group or simply a printed copy of the guideline in the control group.

Study population and sample size: 30 chiropractors will be recruited from a random, nationally representative sample of 200 chiropractors. Each chiropractor will recruit five neck pain patients for a total of 150 patients.

The design of the KT intervention was informed by the results of a related qualitative study (Theoretical Domains Framework interviews) and consists of a series of three webinars, two online case scenarios, a self-management video on Brief Action Planning (BAP) and a printed copy of the practice guideline (Bussières et al., 2015).

Primary feasibility outcomes for both chiropractors and patients include rates of: 1) recruitment, 2) study retention, and 3) adherence to the intervention (Tickle-Degnen, 2013). A checklist of proxy measures embedded within patient encounter forms will be used to assess chiropractors' compliance with guideline recommendations e.g., exercise and self-care prescriptions, at study onset and at three months follow-up.

Secondary outcomes include whether or not the chiropractor's recommended multimodal care, scores on measures of behavioural constructs e.g., self-efficacy, knowledge.

Primary clinical outcomes for patients includes measures of pain intensity and neck pain-specific disability.

Analyses from this pilot study will focus on generating point estimates and corresponding 95% confidence intervals for parameters of a priori interest (e.g., recruitment, retention, adherence, pain intensity, neck disability index).

Discussion: The main strength of this study includes its use of a representative sample and randomized controlled design. The results of this study will inform the design of a larger cluster randomized controlled trial aimed at confirming the effectiveness and increasing the use of multimodal care by chiropractors managing patients with NSNP.

Chiropractors

Inclusion criteria:

• Registered with their professional licensing boards and in private practice in the Canada;
• Graduated at least one year ago;
• Provide chiropractic treatment to a minimum of two adults (age 18-65) with neck pain per week;
• Speak English or French; and
• Have access to Internet.

Exclusion criteria:

• Chiropractors will be excluded if they have already attended the webinar series or the self-management learning module. Prior webinar and learning module participants will have needed to register beforehand, which therefore provides the mechanism for confirming study ineligibility.

Patients

Inclusion criteria:

• Attend a consenting chiropractor for non-specific neck pain of any duration;
• Aged between 18 and 65, with a primary complaint of acute (<3 months) or chronic (>3 months) neck pain presenting as a new condition for treatment at the participating clinic;
• Fluency in English or French to a level where they can read and understand the study information sheet, complete the consent form, and respond to the telephone-administered questionnaire. This will be assessed by the staff member of each chiropractor's team at the time of screening; and
• Provide written informed consent.

Exclusion criteria:

• Previous neck surgery;
• Presence of Red flags;
• Pregnancy; and
• Chiropractic care received in the preceding 3 months for a complaint of neck pain