Analgesics use and ESRD in younger age: a case-control study

Area of Science:

• Nephrology
• Pharmacology
• Epidemiology

Background:

• A 1999/2000 committee found inconclusive evidence linking phenacetin-free analgesics to nephropathy.
• A new, adequately designed case-control study was requested to clarify the association.

Purpose of the Study:

• To investigate the potential causal relationship between phenacetin-free analgesic use and end-stage renal disease (ESRD).
• To determine if analgesic use, particularly high cumulative doses, increases ESRD risk.

Main Methods:

• Population-based case-control study involving 907 end-stage renal disease (ESRD) cases and 3,622 controls under 50 years old.
• Standardized face-to-face interviews collected data on lifetime analgesic use, medical history, and risk factors.
• Unconditional logistic regression analyses were performed to assess associations.

Main Results:

• No association was found between high cumulative lifetime analgesic dose and end-stage renal disease (ESRD).
• Adjusted odds ratios for ever-use versus low-use and high-use versus low-use were not significantly elevated.
• While extreme users (>3.5 kg) showed a risk increase, this was attributed to other underlying conditions.

Conclusions:

• No clinically meaningful evidence supports an increased risk of ESRD from phenacetin-free analgesics.
• The observed risk in extreme users is likely an indirect, non-causal association.
• Findings support evidence that phenacetin-free analgesics do not induce ESRD, necessitating a re-evaluation of "analgesic nephropathy".