ABSTRACT
Background: Physical inactivity and sedentariness are independent risk factors for mortality. Physical inactivity is defined as engaging in insufficient moderate/vigorous physical activity (i.e. not meeting the WHO's recommendations). Sedentariness is defined according to sedentary behavior; evidence suggests that > 8 h/d could serve to consider a person as sedentary. The Chilean National Health Survey 2016-2017 (NHS), using a single question (Question-NHS), considered as "sedentary" those who did not engage in sports or physical activity for ≥ 30 min, ≥ 3 times/wk. Thus, it attempted to estimate sedentariness without considering sedentary behavior. Aim: To determine the prevalence of physical inactivity and sedentariness in Chile, and to contrast such results with the Question-NHS. Material and Methods: We analyzed data from 5564 participants of the 2016-2017 NHS, aged ≥ 18 years. The Global Physical Activity Questionnaire was used to determine moderate/vigorous physical activity and sedentary behavior. We defined physical inactivity as having 8 h/d of sedentary behavior. Results: The prevalences [95% confidence intervals] of physical inactivity and sedentariness were 32% [29-34] and 6% [5-7] respectively, while 3% [2-4] were both physically inactive and sedentary. The Question-NHS classified 88% [86-89] as "sedentary", but among them, 35% were physically inactive and 6% were sedentary. Conclusions: One third of adults are inactive, one out of ten is sedentary, and one out of twenty is inactive and sedentary. The Question-NHS overestimates the population at risk.
ABSTRACT
Introducción: El linfedema es una alteración del sistema linfático cuyo tratamiento convencional es la terapia descongestiva. Para evaluar la respuesta al tratamiento, es necesario medir el volumen el miembro superior. Objetivo: Determinar el nivel de concordancia entre el perómetro y las mediciones perimetrales en la estimación de volumen del miembro superior. Métodos: Estudio transversal. El volumen de ambos miembros superiores se estimó con tres métodos: [a] perómetro, [b] perímetro cada 4cm (método 4cm), y [c] con puntos anatómicos (método 5cm). Resultados: En comparación al perómetro, el método 4cm subestimó, en promedio, 315 mL (límites de concordancia: - 875 mL a 243 mL). El método 5cm subestimó, en promedio, 394 mL (límites de concordancia: - 975 mL a 186 mL), y la subestimación aumentó a medida que aumentaba el volumen del miembro superior. Conclusiones: El perómetro y las mediciones perimetrales tienen un bajo nivel de concordancia en la estimación del volumen del miembro superior.
Introduction: Lymphedema is an alteration of the lymphatic system and the conventional treatment is decongestive therapy. The upper limb measurement is needed to evaluate the treatment results. Objective: To determine the concordance between perometer and perimeter measurements in the upper limb volume. Methods: Cross-sectional study. The volume of both upper limbs was estimated with three methods: [a] perometer, [b] perimeter every 4cm (4cm method), and [c] with anatomical points (method 5cm). Results: Compared to the perometer, the 4cm method underestimated, on average, 315 mL (concordance limits ± 875 mL to 243 mL). The 5cm method underestimated, on average, 394 mL (concordance limits: ± 975 mL to 186 mL), and underestimation increased as the upper limb volume increased. Conclusions: The perometer and perimeter measurements have a low level of concordance in the estimation of upper limb volume.