Association of Age-Related Macular Degeneration with Cholelithiasis.

PURPOSE

Dysregulated lipid metabolism likely contributes to the pathogenesis of age-related macular degeneration (AMD). There is an overlap in risk factors between AMD and diseases of lipid metabolism, such as cholelithiasis, suggesting that an association between these diseases could provide insight into AMD pathogenesis. This study sought to determine if there is an association between cholelithiasis and AMD.

DESIGN

A cohort study was conducted using patients in the Optum deidentified Clinformatics Data Mart database from January 1, 2000, to June 30, 2022.

PARTICIPANTS

Patients over the age of 55 with ≥2 years of data and no prior history of AMD were included. The exposed cohort included patients who had a history of cholelithiasis, cholecystitis, or cholecystectomy. The control cohort included patients with gastroesophageal reflux disease (GERD), matched for age ±3 years, sex, race, and year of index date.

METHODS

Propensity scores were created using multivariable logistic regression and applied to inverse probability of treatment weighting (IPTW). Cox proportional hazard regression modeling with IPTW was used to compare progression to AMD in each cohort.

MAIN OUTCOME MEASURES

Progression to AMD for patients with cholelithiasis, cholecystitis, or a history of cholecystectomy.

RESULTS

A total of 332 536 patients with cholelithiasis and 776 591 matched GERD controls were analyzed. After IPTW, the mean age (±standard deviation) was 66.6 ± 9.4 years in the cholelithiasis cohort and 67.5 (±10.3) years in the GERD cohort. Women comprised 58% of the cholelithiasis cohort and 57% of the GERD cohort. In the cholelithiasis cohort, 3511.7 (1.14%) were diagnosed with AMD, compared with 23 367.1 (2.92%) in the GERD cohort and corresponding to a significantly decreased hazard of AMD (adjusted hazard ratio [aHR] = 0.72, 95% confidence interval [CI]: 0.69-0.75,  < 0.0001). In the subanalysis, before IPTW weighting, AMD developed in 3809 of 275 897 (1.4%) patients with only cholelithiasis (aHR = 0.76, 95% CI: 0.73-0.80,  < 0.0001), 335 of 47 166 (0.71%) patients with cholecystitis (aHR = 0.54, 95% CI: 0.47-0.61,  < 0.0001), and 114 of 9473 (1.20%) patients who underwent cholecystectomy (aHR = 0.50, 95% CI: 0.41-0.63,  < 0.0001).

CONCLUSIONS

Cholelithiasis was associated with a 28% hazard reduction in AMD. More severe gallbladder disease conferred greater protection.

FINANCIAL DISCLOSURES

Proprietary or commercial disclosure may be found in the Footnotes and Disclosures at the end of this article.