Association of systemic lupus erythematosus with hearing loss: a systemic review and meta-analysis

Systemic lupus erythematosus (SLE) is a systemic autoimmune disease that can affect virtually any organ, including middle and/or inner ear. The objective of the current systematic review and meta-analysis was to investigate the association of SLE with the different subtypes of hearing loss. This systematic review and meta-analysis was conducted in agreement with the PRISMA guidelines. The review protocol was registered in the PROSPERO international prospective register of systematic reviews ( https://www.crd.york.ac.uk/prospero/display_record.php?RecordID=216353 ). A random effects model meta-analysis was carried out while heterogeneity was appraised by I². Subgroup analysis and sensitivity analysis were also performed. Nine studies comprising 7,654 SLE patients and 37,244 controls were included in this systematic review. Four of them were rated to a moderate rate of bias, while five of them were rated to a low rate of bias. SLE patients had significantly increased odds of sensorineural hearing loss (SNHL) compared with controls (OR 2.31; 95%CI 1.48-3.60; I² = 0). SLE patients did not have significantly increased odds of Conductive Hearing Loss (CHL) (OR 1.30; 95% CI 0.23-7.45; I² = 0). Only one study reported on the outcome of Mixed Hearing Loss (MHL) (3 events in SLE group vs. 0 events in control group). Subgroup analysis, based on study design and detection method of hearing loss also showed significantly increased odds of SNHL in SLE patients. The significantly increased odds of SNHL in SLE persisted even after sensitivity analysis. In conclusion, SLE is significantly associated with SNHL; SLE is not associated with CHL, while, due to lack of data, we could not reach a conclusion regarding the odds of MHL in SLE patients. Pure tone audiometry as a screening test and follow-up test in SLE patients could be of essence. Management and prognosis of hearing loss in SLE patients should be discussed.