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. 2013 Nov 1;8(11):e78926. doi: 10.1371/journal.pone.0078926

Table 10. Additional multiple linear regression analysis to evaluate confusion between the relationship of absolute values of forced vital capacity (FVC) (L) and forced expiratory volume in 1 second, FEV1 (L) with scoring of radiographic abnormalities.

Absolute values
FVC (L) FEV1 (L)
Parameter estimates (95% CI) Parameter estimates (95% CI)
SRAa -0.071 (-0.098 to -0.044) -0.073 (-0.096 to -0.049)
SRAb -0.071(-0.098 to -0.043) -0.072 (-0.097 to -0.048)
Percent change for age* 0 -1.37
SRAc -0.074 (-0.101 to -0.046) -0.075 (-0.099 to -0.051)
Percent change for height* 4.22 2.74
SRAd -0.075 (-0.101 to -0.048) -0.075 (-0.098 to 0.052)
Percent change for smoking status (former vs. never) 5.63 2.74
SRAe -0.071 (-0.098 to -0.045) -0.073 (-0.096 to - 0.050)
Percent change for pack-years of smoking* 0 0

CI; Confidence Interval, SRA Scoring of radiographic abnormalities, * Percent change >10% means confusion.

a

Adjusted for age, gender, height, smoking status (former vs. never), pack-years of smoking, MRC dyspnea scale and oxygen pulse saturation.

b

Adjusted for gender, height, smoking status (former vs. never), pack-years of smoking, MRC dyspnea scale and oxygen pulse saturation.

c

Adjusted for age, gender, smoking status (former vs. never), pack-years of smoking, MRC dyspnea scale and oxygen pulse saturation.

d

Adjusted for age, gender, height, pack-years of smoking, MRC dyspnea scale and oxygen pulse saturation.

e

Adjusted for age, gender, height, smoking status (former vs. never), MRC dyspnea scale and oxigen pulse saturation.