Table 2 Regression equations of various parameters of infant lung function.

From: Raised-Volume Forced Expiratory Flow-Volume Curve in Healthy Taiwanese Infants

Variable#

 

Coefficient

SE of coefficient*

RSD

R2

FVC, ml

Constant (α)

−615.106

54.8

48.079

0.772

BL, cm (β)

13.752

0.705

FEV0.4, ml

Constant (α)

−137.935

32.253

29.394

0.573

BL, cm (β)

5.069

0.415

FEV0.5, ml

Constant (α)

−205.169

36.739

32.3

0.634

BL, cm (β)

6.552

0.473

FEV0.75, ml

Constant (α)

−390.548

43.936

39.773

0.740

BL, cm (β)

10.02

0.566

FEV1, ml

Constant (α)

−606.480

59.08

53.843

0.737

BL, cm (β)

13.407

0.76

FEF25–75, ml

Constant (α)

−266.101

79.402

70.95

0.479

BL, cm (β)

10.325

1.022

FEF75, ml/s

Constant (α)

−327.062

62.396

56.865

0.536

BL, cm (β)

9.099

0.803

FEF50, ml/s

Constant (α)

−243.795

79.988

72.898

0.473

BL, cm (β)

10.279

1.029

FEV0.5/FVC, %

Constant (α)

121.233

6.791

6.189

0.355

BL, cm (β)

−0.683

0.087

PEF, ml/s

Constant (α)

601.466

22.621

95.911

0.345

Age, mo (β)

10.912

1.426

  1. *All P < 0.001.
  2. #Function: variables = α + β × BL (or Age).