Munizaga B1, Leppe J1
1Universidad del Desarrollo, School of Physical Therapy, Santiago, Chile
Background: Physical activity (PA) brings benefits in health, and this can be measured objectively with accelerometry. Depending on the age of the study population, different algorithms have been created to define PA intensity criteria, seeking to objectify the PA level. Despite of this, in accelerometry analyzes, the intensity criteria of PA used, is not specific for the elderly population, being able to underestimate their level of PA, and limiting an adequate clinical assessment performed by the physiotherapist.
Purpose: To analyze the acceleration measurement in elderly population by comparing different PA intensity criteria and assessing the correlation and agreement with the Global Physical Activity Questionnaire (GPAQ). By achieving an accurate PA estimation, over- or underestimation of PA levels, will help those research studies where a necessary dose of PA is calculated to obtain health outcomes.
Methods: A cross-sectional study was performed using data from the 2010 and 2017 Chilean National Health Surveys. We analyzed PA time using accelerometers (ActiGraph-GT3X +), according to 4 intensity criteria: Freedson (cut point of moderate-vigorous PA=2020 counts/min), Troiano (cut point of moderate-vigorous PA=1951 counts/min), Copeland (cut point of moderate-vigorous PA=1040 counts/min) and Zisko (cut point of moderate-vigorous PA=267 counts/min for men and 213 counts/min for woman) and the level of PA perceived with GPAQ. Spearman´s Rho and Kappa were determined among the instruments. All analysis was performed using STATA 15.0 software.
Results: Data from 81 elderlies were analyzed (58% women; aged P50=68 years old (range=60-92). The PA time of moderate-vigorous intensity according to GPAQ was P50=38.5 min/day and according to accelerometry it varied between P50=2.2 to 87.8 min/day depending on chosen criteria. Correlation for Freedson, Troiano and Copeland criteria were moderate (Spearman´s rho=0.44-0.45-0.44 respectively). Correlation for Zisko was low (Spearman´s rho=0.33). All correlations were statistically significant (p 0.01). According to GPAQ, 56% of the older adult population is classified sufficiently active versus 6%, 5%, 36% and 82% according to Freedson, Troiano, Copeland and Zisko respectively. Only Zisko criterion showed a statistically significant agreement (Kappa=0.26 p 0.05).
Conclusion(s): The PA intensity criteria defined for the elderly population (Copeland and Zisko), decreased the gap between GPAQ and accelerometer, 19% and 28% respectively. The Zisko intensity criteria is the one that most fit adjusted with the level of perceived PA assessed by GPAQ of the Chilean elderly population.
Implications: Having a precise accelerometry analysis criterion allows an adequate assessment by the physiotherapist and the researcher about the level of PA of the older adult. Due to the low correlation and concordance found between intensity criteria for adults with accelerometry and GPAQ, more research is required to be able to objectify the level of PA of the Chilean older adult population, measuring the PA with direct observation to define the criterion of intensity of PA in accelerometry suitable for this population.
Keywords: Physical Activity, Elderly, Accelerometer
Funding acknowledgements: None
Purpose: To analyze the acceleration measurement in elderly population by comparing different PA intensity criteria and assessing the correlation and agreement with the Global Physical Activity Questionnaire (GPAQ). By achieving an accurate PA estimation, over- or underestimation of PA levels, will help those research studies where a necessary dose of PA is calculated to obtain health outcomes.
Methods: A cross-sectional study was performed using data from the 2010 and 2017 Chilean National Health Surveys. We analyzed PA time using accelerometers (ActiGraph-GT3X +), according to 4 intensity criteria: Freedson (cut point of moderate-vigorous PA=2020 counts/min), Troiano (cut point of moderate-vigorous PA=1951 counts/min), Copeland (cut point of moderate-vigorous PA=1040 counts/min) and Zisko (cut point of moderate-vigorous PA=267 counts/min for men and 213 counts/min for woman) and the level of PA perceived with GPAQ. Spearman´s Rho and Kappa were determined among the instruments. All analysis was performed using STATA 15.0 software.
Results: Data from 81 elderlies were analyzed (58% women; aged P50=68 years old (range=60-92). The PA time of moderate-vigorous intensity according to GPAQ was P50=38.5 min/day and according to accelerometry it varied between P50=2.2 to 87.8 min/day depending on chosen criteria. Correlation for Freedson, Troiano and Copeland criteria were moderate (Spearman´s rho=0.44-0.45-0.44 respectively). Correlation for Zisko was low (Spearman´s rho=0.33). All correlations were statistically significant (p 0.01). According to GPAQ, 56% of the older adult population is classified sufficiently active versus 6%, 5%, 36% and 82% according to Freedson, Troiano, Copeland and Zisko respectively. Only Zisko criterion showed a statistically significant agreement (Kappa=0.26 p 0.05).
Conclusion(s): The PA intensity criteria defined for the elderly population (Copeland and Zisko), decreased the gap between GPAQ and accelerometer, 19% and 28% respectively. The Zisko intensity criteria is the one that most fit adjusted with the level of perceived PA assessed by GPAQ of the Chilean elderly population.
Implications: Having a precise accelerometry analysis criterion allows an adequate assessment by the physiotherapist and the researcher about the level of PA of the older adult. Due to the low correlation and concordance found between intensity criteria for adults with accelerometry and GPAQ, more research is required to be able to objectify the level of PA of the Chilean older adult population, measuring the PA with direct observation to define the criterion of intensity of PA in accelerometry suitable for this population.
Keywords: Physical Activity, Elderly, Accelerometer
Funding acknowledgements: None
Topic: Older people; Older people; Health promotion & wellbeing/healthy ageing
Ethics approval required: Yes
Institution: School of Medicine of Pontificia Universidad Católica de Chile
Ethics committee: School of Medicine of Pontificia Universidad Católica de Chile
Ethics number: 09-113
All authors, affiliations and abstracts have been published as submitted.
