Background: Age-related slowing of gait has been reported to start as early as the fifth decade and accelerate beyond the seventh decade of life. A single cutoff for slow gait may not be appropriate for men and women of different ages. We aimed to report reference values for gait speed and spatiotemporal gait parameters of adult age groups in a South East Asian population. Methods: A total of 507 community-dwelling adults, aged 21-90 years were recruited into the study through random sampling, filling quotas of 20-40 participants in each sex and age group (10-year age groups between 21 and 60 years; 5-year age groups beyond age 60 years). Demographic data, height, weight and information on comorbidities were recorded. Habitual gait speed and spatiotemporal parameters were measured, and the average of three trials was recorded using the GAITRite system. Results: Gait speed peaked in their 40s for both men and women, but the trajectories differed slightly across age groups. Although similar for men in their 50s and 60s, gait speed was significantly slower among those aged 71 years and older. For women beyond 50 years old, gait slowed with age. After adjusting for height, women were found to walk significantly faster and with a longer step length than men. Women also walked with a significantly narrower stride width and less external rotation of the feet. The lowest quintile for gait speed in our study cohort was 0.9m/s, below the recommended cutoff of 1.0m/s. Conclusion: We established the reference values as well as the quintiles for gait speed and spatiotemporal gait parameters across adult age groups in a multi-ethnic Asian population. This contributes to a valuable database for gait assessment and evaluation of preventive or rehabilitative programs.

Background: Studies indicate that physiological and cognitive aging are causally related and functionally interdependent. However, the relative contribution of physiological factors and cognition to dual-task costs (DTC) of gait parameters has not been well studied. In this cross-sectional study, we examined the trajectory of DTC of gait parameters across the adult age spectrum for both sexes and identified the contributions of physical and cognitive performance to DTC of gait. Methods: A total of 492 community-dwelling adults, aged 21–90 years, were randomly recruited into the study. Participants were divided into 7 age groups, with 10-year age range for each group. Demographic data, height, body mass, education level, and information on comorbidities were recorded. Cognition was measured using the Repeatable Battery for the Assessment of Neuropsychological Status. Physical performance included visual contrast sensitivity, postural sway, hand reaction time, handgrip strength, knee extensor strength, and single-task and dual-task gait assessments. Stepwise multivariable regression was used to examine the association between physical and cognitive performance with DTC of gait parameters. Results: Women were found to have significantly higher DTC of gait speed (p = 0.01), cadence (p < 0.01), and double support time (p < 0.01) than men. However, significant aging effect on DTC of gait speed (p = 0.01), step length (p = 0.01), and double support time (p = 0.01) was observed in men but not in women. Immediate memory was the primary determinant for the DTC of gait speed (β = −0.25, p < 0.01), step length (β = −0.22, p < 0.01), and cadence (β = −0.15, p = 0.03) in men. Besides immediate memory, postural sway (β = −0.13, p = 0.03) and hand reaction (β = 0.14, p = 0.02) were also significantly associated with DTC of step length and cadence, respectively, in women. Conclusion: There were sex differences in the amplitude and trajectories of DTC of gait parameters. The DTC increased with age in men but not in women. Immediate memory was the primary determinant of DTC of gait parameters in men while immediate memory, postural sway, and reaction time were associated with DTC of gait in women. Future studies should investigate the clinical implications of the sex differences in the DTC with fall risks.

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Fear-of-falling (FOF) can be adaptive or maladaptive depending on one’s appraisal of knowledge and beliefs, but few have elucidated this cognitive process in older adults surrounding falls. We aim to identify risk factors for high FOF amongst community-dwelling older adults (OA) and middle-aged adults (MA) in Singapore. This was a cross-sectional survey of a nationally-representative sample of OA (≥60 years) and MA (40-59 years) identified by stratified random sampling. Primary outcome was high FOF measured by a single-item (4-point scale). Independent variables were history-of-falls, quality-of-life, fall-related cognitive appraisal (balance problems, importance to restrict activities to prevent falls) and knowledge indicators (knowledge of other OA who fell, ability to identify out of 13 fall risk factors). MA were also asked if they’re caregivers. Multiple logistic regressions identified risk factors for high FOF separately by age-groups, adjusting for socio-demographics and comorbidities. The final analysis included 549 OA (70.6±6.88 years) and 309 MA (49.7±5.89 years). No differences in high FOF was found among OA and MA (37% vs. 38%, p=0.305), but there were more falls among OA (19% vs 12%, p=0.010). Higher knowledge of fall risk factors and self-reported balance problems were significant risk factors for high FOF among OA only, while a history-of-falls and being a caregiver were significant among MA only. Perceived importance to restrict activities was associated with high FOF in both age-groups. Although findings suggest differences in the mechanism of high FOF between OA and MA, both age-groups have maladaptive appraisal tendencies related to restrict activities to prevent falls.