Correlation Analysis of Subjective Preferences and Mattress Pressure Comfort

The relationship between mattress firmness and user comfort plays a critical role in the development of personalized mattress designs. Although previous studies have examined subjective preferences and comfort perception, few have explored the specific correlations between subjective firmness preferences, hardness perception, and comfort. A stratified sample of 60 adults (30 female; age 18-60) was recruited through 3D anthropometric percentiles (height: 152.6-182.0 cm; waist circumference: 70.0-105.4 cm), with subjective preference distribution as follows: soft (n=23), medium (n=25), and firm (n=12). Participants evaluated four mattress configurations (inflation levels: 0/20/50/80) using validated 5-point Likert scales under standardized supine positioning. The results include correlation analyses between subjective preferences, firmness perception, and comfort ratings, as well as the identification of optimal air-cell inflation values for each preference group. These findings provide new insights for the design of personalized mattresses aimed at enhancing sleep quality.