Table 1.
General characteristics of the study sample composed by asymptomatic children, separately for males and females (No. = 2,393).
Table 2.
Characteristics of enrolled sample (No. = 3,200).
Fig 1.
Slopes of FVC and FEV1 linear regression lines to weight.
Linear regression lines (i.e., the fitted values followed by the lower and upper bounds of the 95% confidence interval for mean response) of the relationships between Forced Vital Capacity (FVC) and Forced Expiratory Volume in One second (FEV1), as response variables, and weight, as explanatory one, plotted according to parameters estimates in Table 3, for a male child belonging to the ≥14 yrs old age class, of 1.64m height (mean value for male 14 yrs old subjects in the sample).
Table 3.
Parameter estimated by multiple linear regression analysis models for FVC, FEV1, and FEF25–75% as dependent variables and sex, age class, height, and weight as independent variables.
Table 4.
Parameter estimated by multiple linear regression analysis models for FEV1/FVC and FEF25–75%/FVC as dependent variables and sex, age class, height, and weight as independent variables.
Table 5.
β coefficients* estimated by multiple linear regression analysis for FVC, FEV1, FEV25–75%, FEV1/FVC, and FEV25–75%/FVC as dependent variables and sex, height, and weight as independent variables, separately for each age class (≤11, 12, 13, and ≥14 years), among 2,393 asymptomatic children.
Table 6.
Analysis performed on 2,393 asymptomatic children.
Table 7.
Parameter estimated by multiple linear regression analysis models for FVC, FEV1, and FEV25–75% as dependent variables and sex, age class, presence/ absence of personal history of respiratory symptoms, height, and weight as independent variables.
Table 8.
Parameter estimated by multiple linear regression analysis models for FEV1/FVC and FEV25–75%/FVC as dependent variables and sex, age class, presence/ absence of personal history of respiratory symptoms, height, and weight as independent variables.
Table 9.
Analysis performed on 807 children reporting wheeze, nocturnal cough, or exercise-induced cough.