Lupus & antiphospholipid syndrome

The mediating effect of fatigue in impaired quality of life in systemic lupus erythematosus: mediation analysis of the French EQUAL cohort

Rheumatology (Oxford)Published Mediation analysis of a prospective cohort

Authors' conclusion

The effect of MSK flares and depression on physical health impairment is largely mediated by fatigue.

Study context

Population
Patients with SLE in a large multicentre French cohort (EQUAL)
Participants
336 patients
Outcome
Proportion of the total effect of MSK flares and depression on physical health impairment (LupusQoL and SLEQOL domains) mediated by fatigue
Methodological detailsFrench EQUAL cohort, multicentre
  • French EQUAL cohort
  • Multicentre

Main finding

As reported in the abstract

Proportion of total effect on physical health impairment explained by fatigue

Musculoskeletal (MSK) flares, LupusQOL 'Physical health' domain

59.6% to 78%

MSK flares, SLEQOL 'Physical functioning' domain

51.1% to 73.7%

Depression, LupusQOL 'Physical health' domain

68.8% to 87.6%

Depression, SLEQOL 'Physical functioning' domain

79.3% to 103.2%

Observational data: associations, not effects.

Further findings

Prevalence of exposures at inclusion

MSK flares, 94 patients
28%
Depression, 99 patients
29.5%

Original publication

The mediating effect of fatigue in impaired quality of life in systemic lupus erythematosus: mediation analysis of the French EQUAL cohort. Rheumatology (Oxford). Published 19 January 2023. doi:10.1093/rheumatology/kead020

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