2.4. Outcome Measures. Structured e-mail based questionnaires were applied before and after the intervention. The primary outcome was musculoskeletal pain symptoms in neck/shoulder and secondary outcome was headache characteristics
[24]. The standardized nordic questionnaire [26] was applied at baseline before the randomization and repeated after the intervention. The questions were “How many days have you had trouble in body part during the last three months?” (0 days; 1–7 days; 8–30 days; >30 days; everyday) for symptom duration, and “On average, howintensewas your pain in body part during the last three months on a scale ranging from 0 to 9?” where 0 is no pain and 9 is worst imaginable pain for symptom intensity. The same question was also asked for pain during the previous seven days.