Reference values for flow-volume curves during forced vital capacity breathing in male children and young adults.
127 non-smoking males aged 8-25 years were studied to obtain normal reference values for flow-volume (FV) curves. Analysis of variance (ANOVA) showed significant differences for all indices (PEF; MEF 25%, 50%, 75%; PIF; MIF 25%, 50%, 75%) in the first three age-groups (8-10, 11-13 and 14-16 years); the three last groups (17-19, 20-22 and 23-25 years) did not show any significant variation of FV curve data. Male subjects older than 16 years showed a negative correlation between maximal expiratory flow at 50% of forced vital capacity and standing height. Multiple regression equations relating FV curve indices to age and anthropometric data are calculated.
D000293:Adolescent; D000328:Adult; D000367:Age Factors; D002648:Child; D006801:Humans; D008168:Lung / Q000502:physiology*; D008170:Lung Compliance; D008176:Lung Volume Measurements; D008297:Male; D012016:Reference Values; D014797:Vital Capacity