Height loss starting in middle age predicts increased mortality in the elderly

Area of Science:

• Gerontology
• Epidemiology
• Public Health

Background:

• Height loss is a common aging phenomenon.
• Its association with mortality risk, particularly when starting in middle age, requires further investigation.
• Understanding this link can inform preventative health strategies for aging populations.

Purpose of the Study:

• To determine the mortality risk associated with height loss (HL) in Japanese men and women starting in middle age.
• To analyze the association between HL and all-cause mortality, as well as cause-specific mortality.
• To investigate if HL is an independent risk factor for mortality, adjusting for lifestyle and physical factors.

Main Methods:

• A cohort of 2498 Japanese adults (aged 47-91) was followed for mortality status over a decade.
• Mortality risk was assessed using age-stratified Cox proportional hazards models.
• Adjustments were made for sex, radiation exposure, smoking, alcohol intake, blood pressure, cholesterol, and diagnosed diseases.

Main Results:

• Height loss exceeding 2cm from middle age was significantly associated with increased all-cause mortality (HR=1.76).
• This significant association extended to deaths from coronary heart disease/stroke (HR=3.35) and respiratory diseases (HR=2.52).
• Height loss was not significantly associated with cancer mortality, and the association remained significant even after excluding individuals with vertebral deformities.

Conclusions:

• Height loss of more than 2cm, beginning in middle age, is an independent risk factor for mortality in Japanese adults.
• This significant risk applies to cardiovascular and respiratory diseases, even after accounting for various confounding factors.
• Monitoring and addressing height loss in middle-aged individuals may be crucial for mitigating mortality risk in later life.