Poor appetite in later life was linked to faster loss of mobility

Design

Prospective community cohort with competing-risk analysis

Population

3,073 community-dwelling adults aged 70–79 (Health ABC)

Primary outcome

Persistent lower-extremity mobility limitation over 6 years

Effect

Poor appetite adjusted HR 1.44 (95% CI 1.2–1.7); 40% vs 20% limited by 18 months

The Health, Aging and Body Composition study followed 3,073 community-dwelling adults aged 70–79 for up to 6 years. Baseline appetite was recorded as good or poor, along with IL-6, TNF-α and CRP. The outcome was persistent lower-extremity limitation: difficulty walking a quarter mile or climbing 10 steps on two reports six months apart.

Poor appetite was reported by 12.6%. More of them developed mobility limitation (64% vs 47%), and by 18 months 40% had done so against 20% of those with good appetite. After adjustment for disease, mood, medicines and sensory factors, poor appetite carried a hazard ratio of 1.44 (95% CI 1.2–1.7). Raised inflammatory markers were independently associated with risk, and people with both poor appetite and inflammation declined fastest — half within about a year.

This is observational and cannot show that improving appetite prevents decline. But appetite is a simple question, and a positive answer can prompt a nutrition and function review before mobility is lost.

• Ask older patients directly whether their appetite has fallen, and record the answer.
• Review weight, medicines that blunt appetite, oral health, mood and swallowing when appetite is poor.
• Consider early dietetic and physiotherapy input for those reporting poor appetite.
• Look for treatable inflammatory or chronic disease when poor appetite has no clear cause.

Why it matters

A one-word answer about appetite identified people who lost mobility within months.

Don't overread it

Observational — it does not show that treating poor appetite slows functional decline.

The statistics, in plain English

A hazard ratio of 1.44 means mobility limitation developed about 44% faster in people with poor appetite. Because appetite was self-reported once at baseline, and the study is observational, it marks risk rather than proving cause.

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