Construct | Measure | Measurement scale |
---|---|---|
Feasibility of recruitment, retention, and data completion (both chiropractors and patients) | Recruitment and retention rates, missing data | Descriptive statistics: mean and SD for continuous variables and proportions for categorical variables |
Chiropractor process outcomes | ||
Adherence rate | Single indicators | Continuous data (number of DCs adhering to the intervention per number of eligible participants) |
Composite | Count of indicators reaching “success” threshold | |
Behavioural | Level of knowledge and self-efficacy | 5-point Likert scale (from 1 = strongly agree to 5 = strongly disagree), ordinal |
Patient health outcomes | ||
Pain | Visual analogue scale | Self-rated level of pain on 11 points, continuous |
Disability | Neck Disability Index | Scale range and subscales: 10 items in total; each item is scored from 0 to 5 (“0” = no disability and “5” = full disability) for a total of 50 |
Satisfaction with care | Questionnaire | Self-rated satisfaction with care measured on the short-form questionnaire rated on a 5-point Likert scale from “very satisfied” to very “dissatisfied” |
Potential efficacy | Post-intervention between groups | Normal approximation to the binomial |