Objective:
To investigate the association between long-term cannabis use and the risk of developing postoperative proliferative vitreoretinopathy (PVR) following retinal detachment repair, highlighting its potential clinical significance.
Key Findings:
- Cannabis users had lower rates of PVR at 6 months (2.10% vs 4.36%) and 1 year (2.52% vs 4.61%) compared to controls, with relative risks of 0.48 and 0.55 respectively.
- Complex reoperation rates were also lower in cannabis users at both time points, with relative risks of 0.62 and 0.63.
- Secondary analysis showed similar trends for patients undergoing PPV with or without scleral buckle.
Interpretation:
The study suggests a potential protective association between cannabis use and reduced PVR risk, although the absolute risk reduction is modest, indicating the need for cautious interpretation.
Limitations:
- Potential underreporting of cannabis use.
- Inability to assess visual acuity or quantify cannabis exposure.
- Cannabis users had higher rates of systemic comorbidities, which may influence outcomes.
Conclusion:
While findings indicate cannabis use may reduce PVR development, further intervention trials are necessary to control for confounding factors and validate these results.
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