Development of a physical performance summary score in middle age: Findings from the CARDIA Function study

Area of Science:

• Gerontology
• Epidemiology
• Physical Performance Measurement

Background:

• Limited physical performance assessment tools exist for middle-aged adults.
• The Coronary Artery Risk Development in Young Adults (CARDIA) Function study provides a unique dataset for this age group.

Purpose of the Study:

• To develop and validate a summary physical performance score (CARDIA Physical Performance [CAPP] score) for middle-aged adults.
• To assess the utility of the CAPP score in epidemiological studies.

Main Methods:

• Developed the CAPP score using sex-specific quartiles of physical performance measures (gait speed, balance, strength, endurance).
• Assigned points (0-4) for each performance measure, summing to a total score (0-20).
• Examined correlations between CAPP score and self-reported function (PROMIS-SF20a), physical activity, quality of life, and anthropometrics in 2,021 participants.

Main Results:

• A higher CAPP score was significantly associated with better self-reported function (PROMIS-SF20a).
• The CAPP score demonstrated a strong canonical correlation (0.63) with other function-related measures.
• The score effectively captured a wide range of physical performance.

Conclusions:

• The CARDIA Physical Performance (CAPP) score is a valid and reliable measure for assessing physical performance in middle-aged adults.
• The CAPP score is suitable for use in epidemiological research to evaluate physical limitations and function.