Martin Luther King Jr. Day
Our office will be closed Monday, Jan 18th in observance of Martin Luther King Jr. Day. We will reopen at regular business hours on Tuesday, Jan 19th.
Research Study Abstract
- Home /
- Research Database /
- Research Study Abstract
Correction to the Prevalence the Physically Inactivity in the National Health Survey Chile 2009-10
- Presented on April 2014
Objective: The correction to the prevalence of the physical inactive in a 2009-10 Chilean National Health Survey (NHS) through the use of accelerometers.
Methods: Population older than 15 years old were recruited from different educational levels of the urban area of Santiago-Chile, who had answered the GPAQ ítem during 2009-10 NHS. Physical Activity (PA) was measured using ActiGraph GT3X for a period of 7 days long. Measures of agreement, sensitivity-specificity and discriminant analysis were evaluated in order to generate an adjustment model.
Results: 158 out 306 participants used the accelerometers ≥5 days (age=44.6 ±14.5 years, 55.7% females). Using the information of the accelerometers as a gold standard, GPAQ presented a sensitivity=0,44 to detect a individual as insufficiently active and specificity=0,80. Through discriminant analysis, the variables: PA minutes/day, sex, educational level and BMI, were identified as prognostic factors for a model that estimates the probability of being categorized as an insufficiently active. The predictive quality of the model has an acceptable discrimination (area under ROC curve=0,76), Sensitivity=0,74 / Specificity=0,61. The model correctly classifies 63,5% of the subjects. The model allows to correct the national prevalence of insufficiently active subjects from 27,1% to 53,5%.
Conclusion: The prevalence of adjusted model is comparable with the results reported in the Latin American countries. The GPAQ overestimates the PA. There is a missclassification error in the questionnaire, which can be moderately adjusted through a model that uses diary PA level reported by GPAQ, sex, BMI and educational level.
Presented at
ICPAPH 2014