Table 1.
Demographic, anthropometric, and spirometric characteristics of male participants.
Table 2.
Demographic, anthropometric, and spirometric characteristics of female participants.
Table 3.
Partial-regression coefficients of log-transformed equations predicting the reference means of spirometric parameters in the young-age male and female groups.
Table 4.
Partial-regression coefficients of log-transformed equations predicting the reference means of spirometric parameters in the middle-age male and female groups.
Table 5.
Partial-regression coefficients of log-transformed equations predicting the reference means of spirometric parameters in the advanced-age male and female groups.
Figure 1.
Age-specific effects of height (H) on decision of FVC and FEV1 estimated for three different age groups of either males or females.
(A): Partial regression coefficients of Ln(H) for reference means of Ln(FVC) in young-, middle-, and advanced-age groups of both genders. Partial regression coefficients of Ln(H) for Ln(FVC) are denoted as ΔLn(FVC)/ΔLn(H). (B): Partial regression coefficients of Ln(H) for Ln(FEV1) are designated as ΔLn(FEV1)/ΔLn(H).
Figure 2.
Age-specific impacts of height (H) on PEF and FEF50 estimated for three different age groups of both men and women.
(A): Partial regression coefficients of Ln(H) for reference means of Ln(PEF) in young-, middle-, and advanced-age groups of either gender. Partial regression coefficients of Ln(H) for ΔLn(PEF) are defined as ΔLn(PEF)/ΔLn(H). (B): Partial regression coefficients of Ln(H) for Ln(FEF50) are defined as ΔLn(FEF50)/ΔLn(H).
Figure 3.
Age-specific effects of height (H) on decision of FEV1/FVC and FEF75 estimated for three different age groups of male and female participants.
(A): Partial regression coefficients of Ln(H) for reference means of Ln(FEV1/FVC) in young-, middle-, and advanced-age groups of either gender. Partial regression coefficients of Ln(H) for Ln(FEV1/FVC) are denoted as ΔLn(FEV1/FVC)/ΔLn(H). (B): Partial regression coefficients of Ln(H) for Ln(FEF75) are designated as ΔLn(FEV75)/ΔLn(H).
Figure 4.
Age-specific contributions of body weight (BW) to FVC and FEV1 estimated for three different age groups of both genders.
(A): Partial regression coefficients of Ln(BW) for reference means of Ln(FVC) in young-, middle-, and advanced-age groups of either gender. They are designated as ΔLn(FVC)/ΔLn(BW). (B): Partial regression coefficients of Ln(BW) for Ln(FEV1) are designated as ΔLn(FEV1)/ΔLn(BW).
Figure 5.
Age-specific impacts of body weight (BW) on PEF and FEF50 estimated for three different age groups of male and female participants.
(A): Partial regression coefficients of Ln(BW) for the reference means of Ln(PEF) in young-, middle-, and advanced-age groups of both genders. Partial regression coefficients of Ln(BW) for Ln(PEF) are defined as ΔLn(PEF)/ΔLn(BW). (B): Partial regression coefficients of Ln(BW) for Ln(FEF50) are defined as ΔLn(FEF50)/ΔLn(BW).
Figure 6.
Age-specific contributions of body weight (BW) to decision of FEV1/FVC and FEF75 estimated for three different age groups of both genders.
(A): Partial regression coefficients of Ln(BW) for reference means of Ln(FEV1/FVC) in young-, middle-, and advanced-age groups of both genders. They are designated as ΔLn(FEV1/FVC)/ΔLn(BW). (B): Partial regression coefficients of Ln(BW) for Ln(FEF75) are designated as ΔLn(FEF75)/ΔLn(BW).
Figure 7.
Age-specific impacts of body fat mass (BFM) on FEV1 and FEV1/FVC estimated for three different age groups of both men and women.
(A): Partial regression coefficients of Ln(BFM) for reference means of Ln(FEV1) in young-, middle-, and advanced-age groups of either gender, which were expressed as ΔLn(FEV1)/ΔLn(BFM). (B): Partial regression coefficients of Ln(BFM) for Ln(FEV1/FVC), being defined as ΔLn(FEV1/FVC)/ΔLn(BFM).
Figure 8.
Age-specific impacts of body fat mass (BFM) on deciding FEF50 and FEF75 estimated for three different age groups of male and female participants.
(A): Partial regression coefficients of Ln(BFM) for reference means of Ln(FEF50) in young-, middle-, and advanced-age groups of either gender. They are expressed as ΔLn(FEF50)/ΔLn(BFM). (B): Partial regression coefficients of Ln(BFM) for Ln(FEF75) are defined as ΔLn(FEF75)/ΔLn(BFM).
Figure 9.
Opposite effects of body weight (BW) and body fat mass (BFM) on FEF75 in female middle-age group.
(A): Ln(FEF75) vs. Ln(BW). Parentheses: absolute values of BW without log-transformation. Red line: slope of the equation predicting reference means of Ln(FEF75) from Ln(BW), which is equal to partial regression coefficient shown in Table 4 and Fig. 6-(B). (B): Ln(FEF75) vs. Ln(BFM). Parentheses: absolute values of BFM with no log-transformation. Red line: slope of the equation predicting reference means of Ln(FEF75) from Ln(BFM), which is equal to partial regression coefficient given in Table 4 and Fig. 8-(B).