Additional Variables
neck pain, pain, Work-related stress, CHF
CHF
Other information collected included: employer (Zurich, Aargau), workload percentage (< 80%, 80–89%, 90–99%, 100%; 100% corresponds to 42 h per week), work role (with or without a leadership responsibilities), education level (tertiary level education, non-tertiary level education), average weekly earnings (in CHF), civil status (married, not married but in a relationship, not married and not in a relationship), nationality (Swiss, non-Swiss), intensity of the neck pain (Numerical Rating Scale (NRS) from 0 = no pain to 10 = maximum pain), gender (male, female), first onset of neck pain (in months), and age. Work-related stress conditions were assessed using the Job-Stress-Index (JSI). The JSI is based on validated questionnaires and represents the ratio of work-related resources (e.g., holistic work tasks) to stressors (e.g., time pressure) [