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Table 4 Regression coefficients for lung function values against age, height and body mass index for each sex and for both pre- and post-bronchodilator values

From: Can spirometric norms be set using pre- or post- bronchodilator test results in older people?

 

Pre/Post Broncho-dilator

Sex

Intercept (mean)*

Intercept (LLN)*

Age

Age squared

Height

BMI

R2

FEV1 (L)

Pre

M

4.153

3.353

−0.034

 

0.039

−0.02

0.61

 

Post

M

4.244

3.475

−0.034

 

0.039

−0.02

0.63

 

Pre

F

3.123

2.564

−0.028

 

0.029

−0.009

0.64

 

Post

F

3.201

2.648

−0.028

 

0.029

−0.01

0.65

FVC (L)

Pre

M

5.293

4.322

−0.031

 

0.055

−0.029

0.58

 

Post

M

5.247

4.297

−0.031

 

0.053

−0.03

0.58

 

Pre

F

3.991

3.287

−0.028

 

0.043

−0.017

0.62

 

Post

F

3.944

3.242

−0.027

 

0.042

−0.016

0.61

FEV6 (L)

Pre

M

5.171

4.272

−0.036

 

0.054

−0.031

0.64

 

Post

M

5.142

4.262

−0.034

 

0.052

−0.029

0.63

 

Pre

F

3.892

3.238

−0.030

 

0.04

−0.016

0.65

 

Post

F

3.879

3.225

−0.029

 

0.04

−0.016

0.65

FEV1/FVC (%)

Pre

M

78.407

68.626

−0.102

−0.00359

−0.062

 

0.19

 

Post

M

80.883

71.563

−0.085

−0.00362

−0.048

 

0.19

 

Pre

F

77.876

68.782

−0.041

−0.00446

−0.172

0.105

0.17

 

Post

F

80.818

71.811

−0.013

−0.00532

−0.119

 

0.18

  1. *for men aged 40 years, with body mass index 23 and 175 centimetres tall and women aged 40 years, with body mass index 23 and 165 centimetres tall.