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Table 3 Descriptive analysis of the markers evaluated in lung function in individuals aged 5 to 18 years

From: Lung function in obese children and adolescents without respiratory disease: a systematic review

Variable Association  
+ No difference Total
FVC 8 5 10 23
FEV1 4 6 13 23
FEV1/FVC 1 10 7 18
FEF25–75% 1 7 8 16
Peak expiratory flow measured by spirometry 2 4 3 9
Expiratory reserve volume 3 2 5
Functional residual capacity 3 3
Total lung capacity 3 3
Residual volume 3 3
Inspiratory capacity 2 2
  1. +, studies that showed comparative markers with greater value in obesity or positive associations with variables that are indicative of obesity; −, studies that showed comparative markers with lower value in obesity or with negative association with variables that are indicative of obesity; FVC, forced vital capacity; FEV1, forced expiratory volume in the first second of forced vital capacity; FEV1/FVC, forced expiratory volume in the first second and forced vital capacity ratio; FEF25–75%, forced expiratory flow between 25 and 75% of forced vital capacity