The correlation between occupation type and fibromyalgia severity.

Background: Fibromyalgia (FM) is a chronic pain disorder associated with financial burden, decreased work productivity and absenteeism. Occupational stressors and specific employment factors may contribute to the severity of FM.

Aims: To determine if occupation type or employment status correlates with FM diagnostic and severity parameters, as assessed via validated instruments including tender points (TP), Widespread Pain Index (WPI), Symptom Severity (SS) and pain regions.

Methods: We performed a cross-sectional study of 200 adult patients diagnosed with FM at a single-centre FM clinic. Demographic and clinical data were extracted from the electronic medical records. Occupations were manually grouped in an iterative modified-Delphi approach and participants were grouped by employment status (Working, Not Working/Disabled or Retired) for analysis.

Results: In our cohort, 61% were employed and 24% were not working/disabled, while the remainder were students, homemakers or retired. SS score was significantly higher (P < 0.001) in not working/disabled patients compared to those employed. Business owners had the lowest TP count (median = 14) and the lowest median SS score (median = 7). WPI was highest for Others (Arts/Entertainment, Driver/Delivery and Housekeeper/Custodian workers; median=16) and the lowest for Retail/Sales/Wait Staff (median = 11).

Conclusions: Work-related factors, occupation type and employment status correlate with diagnostic and severity parameters of FM. Employed participants had significantly lower SS scores suggesting that work loss correlates with SS. Participants employed in entry-level jobs or jobs with higher physical or financial stressors may experience greater FM symptoms. Further studies are required to explore work-related factors and their impact on the diagnostic and severity parameters of FM.