Objective firmness, average pressure and subjective perception in mattresses for the elderly

Area of Science:

• Ergonomics and Human Factors
• Gerontology
• Materials Science

Background:

• Independent living for seniors necessitates navigating daily tasks, including purchasing decisions like mattresses, often with limited trial periods.
• Short-term in-store mattress trials are crucial for acceptance, despite long-term implications for comfort and usability.
• Understanding how seniors perceive mattress properties is vital for manufacturers to align product benefits with customer expectations.

Purpose of the Study:

• To investigate the mechanical aspects of mattress comfort and usability for elderly individuals during simulated short-term purchasing trials.
• To correlate perceived mattress properties (firmness, usability, comfort) with objective mechanical measurements.
• To determine if age influences the perception of mattress characteristics relevant to independent living.

Main Methods:

• Comparative analysis of four elderly-specific mattresses using paired comparisons over short durations (1 minute per test).
• Simulated in-store trials involving young and elderly participants assessing perceived firmness, usability (ease of movement), and comfort.
• Correlation of subjective perceptions with objective measurements including pressure distribution and objective firmness (load/deflection).

Main Results:

• No significant differences in mattress perception were found between young and elderly participants.
• Perceived mattress firmness is reliably predicted by pressing with a body part (hands, buttocks) or full body contact (lying down).
• Objective firmness and average pressure positively correlate with perceived firmness, overall comfort, and reduced difficulty in rolling. Higher BMI shows a weak correlation with sensitivity to objective firmness.

Conclusions:

• Short-term mattress trials effectively capture user perceptions of firmness and comfort for both young and elderly individuals.
• Objective mechanical properties of mattresses can predict user-perceived comfort and usability, aiding product design for independent living.
• Manufacturers can use objective measurements to ensure short-term trials reflect long-term benefits for senior consumers.