Chronic Non-Specific Neck Pain Treated With Tai Chi and Chiropractic Care

Recruitment rate will be evaluated with respect to rate of enrollment, defined as randomization into the trial.

Retention rate will be quantified by the proportion of subjects who remain in the study to complete the 24-week visit.

Intervention adherence will be measured by collection of chiropractic visit attendance and Tai Chi class attendance data.

Pain intensity over the past 7 days will be measured using an 11 point numerical rating scale with 0 indicating "no neck pain at all" and 10 indicating "worst neck pain imaginable".

Pain on movement (POM) will be assessed using a previously validated and reliable protocol. Participants are asked to flex, extend, laterally flex, and laterally rotate their necks to the left and right. The evoked pain is measured on a 100mm visual analog scale (VAS), for each direction. An average POM score is then calculated from these data for each participant.

Bothersomeness of Pain (BOP) in the past 7 days will measured on a 0-10 scale (0 indicating ''neck pain not at all bothersome'' and 10 indicating ''neck pain extremely bothersome'').

Functional neck-related disability will be measured using the Neck Disability Index. This validated and reliable 10-item questionnaire determines how participants see their neck pain affecting their daily activities. The maximum score is 50. Scores of ≤4 indicate no disability; 5 to 14 indicate mild disability, 15 to 24 moderate disability, and 25 to 34 severe disability. Scores >35 indicate complete perceived disability.

The (Profile Physical and Mental Health Summary Scores) PROMIS-29 will be used to characterize global health-related quality of life. This validated, reliable, and widely used instrument includes 7 key domains: Physical function, anxiety, depression, fatigue, sleep disturbance, ability to participate in social roles and activities, pain interference, and pain intensity. All items except for a single question evaluating pain intensity are rated on a 5-point Likert scale. PROMIS-29 has excellent psychometric properties and offers the ability to compare scores across conditions and to general population norms.

Self-efficacy will be measured using the General Self-Efficacy Scale (GSES). The GSES measures a participant's confidence in their ability to respond to environmental demands and challenges. The scale consists of 10 items with a 4-point Likert response scale ranging from 1 ("not at all true") to 4 ("exactly true"). Higher summed scores indicate greater self efficacy (SE) to complete the task.

Postural awareness will be measured using the Postural Awareness Scale (PAS) which includes 12 items that describe the awareness of body posture and postural control. Higher scores indicate more awareness and control of one's posture.

The Pain Catastrophizing Scale will be used to assess catastrophic thinking associated with pain. This instrument consists of 13 items that measure rumination, magnification, and helplessness related to pain. Higher scores correspond to higher levels of catastrophic thinking associated with pain.

Fear of Movement will be measured using the Tampa Scale for Kinesiophobia. This instrument consists of 17 items that measure pain-related fear with higher scores indicating higher levels of kinesiophobia.

Interoceptive awareness, the sensitivity toward stimuli originating from within the body, will be measured using the Multidimensional Assessment of Interoceptive Awareness (MAIA) which consists of 40 items resulting in eight separate dimensions of interoceptive awareness; higher scores represent higher awareness.

Qualitative interviews will be employed to further probe participants' perceptions of chiropractic care with and without the addition of TC training focusing on: a) understanding facilitators and barriers to participation in a pragmatic trial utilizing community-based practitioners, and b) patient-centered experiences that might inform outcome measures to use in a future trial.