Adiponectin and noncardiovascular death: a nested case-control study

Area of Science:

• Biochemistry
• Epidemiology
• Gerontology

Background:

• Adiponectin, an adipokine, plays a role in metabolic regulation.
• Systemic wasting is a complex condition often preceding death, particularly in older adults.
• The relationship between adiponectin and noncardiovascular mortality requires further investigation.

Purpose of the Study:

• To evaluate the association between adiponectin levels and noncardiovascular death.
• To test the hypothesis that adiponectin levels reflect systemic wasting.

Main Methods:

• Nested case-control study design.
• Utilized data from the Jichi Medical School Cohort Study (12,490 subjects).
• Analyzed 103 noncardiovascular death cases and 565 controls over 10.8 years, estimating odds ratios (ORs) across adiponectin quintiles.

Main Results:

• Elevated adiponectin levels (second lowest and highest quintiles) showed increased noncardiovascular death risk (ORs 2.38 and 2.16) adjusted for age and sex.
• These significances disappeared after adjusting for BMI and C-reactive protein.
• Excluding cancer deaths, higher adiponectin levels remained significantly associated with mortality (ORs 2.80-3.98) even after further adjustments.
• Adiponectin showed linear associations with noncardiovascular noncancer death risk (OR per 1 SD increase: 1.72-2.01).

Conclusions:

• Adiponectin is an independent indicator of noncardiovascular mortality.
• Adiponectin levels may be associated with systemic wasting preceding death.
• Further research is warranted to elucidate the mechanisms linking adiponectin, systemic wasting, and mortality.