- Indicator for a period; duration of the period is not limited to length of the indicator and dependent on duration of interventions, *: Neck Pain and Disability Scale or Shoulder Pain and Disability Index, †: EuroQol group instrument with 5 levels of severity for each of the 5 dimensions, ‡: Numeric Rating Scale Pain, §: 36-Item Short Form Health Survey, ¶: Brief Illness Perception Questionnaire, #: Dutch version of the short form Patient Activation Measure, **: ActiGraph accelerometer, ††: Exercise Adherence Rating Scale, ‡‡: Global Perceived Effect scale, ¶¶: 8-point Likert scale