Skip to main content

Table 2 Factors associated with FVC less than lower limit of normal using NHANES equation

From: Reduced forced vital capacity is independently associated with, aging, height and a poor socioeconomic status: a report from the Tunisian population-based BOLD study

Variables

Categories

Univariate model

Multivariate model

OR

95% CI

p value

OR

95% CI

p value

Age group, yr

40–49 (reference)

1

  

1

  

50–59

1.559

1.042–2.331

0.031

1.469

0.982–2.289

0.076

60–69

1.894

1.140–3.148

0.014

1.849

1.031–3.315

0.039

 ≥ 70

1.457

0.661–3.213

0.351

1.312

0.551–3.120

0.540

Height, m

 

1.029

1.010–1.048

0.002

1.026

1.005–1.047

0.014

Body mass index, Kg/m2

BMI < 20

1.799

0.990–3.271

0.054

1.395

0.730–2.665

0.313

20 ≤ BMI < 25 (reference)

1

  

1

  

25 ≤ BMI < 30

1.535

0.566–1.164

0.400

1.206

0.420–3.463

0.728

30 ≤ BMI < 35

1.540

0.890–2.663

0.122

1.122

0.625–2.016

0.700

BMI ≥ 35

1.017

0.559–1.848

0.957

0.831

0.447–1.545

0.558

Sex

Women

1.073

0.759–1.517

0.688

0.976

0.570–1.670

0.929

Smoking status

Non-smoker (reference)

1

  

1

  

Current smoker

1.700

0.963–3.001

0.067

1.459

0.796–2.677

0.222

Former smoker

1.250

0.824–1.896

0.293

1.130

0.656–1.946

0.660

Ever go hungry for lack of money at the age of five

Yes

1.313

0.919–1.877

0.135

1.466

1.000–2.151

0.050

Education, yr of schooling

7 + (reference)

1

  

1

  

0–6

1.571

1.111–2.223

0.011

1.625

1.087–2.430

0.018

Dusty job§

Yes

0.856

0.553–1.326

0.487

1.193

0.705–2.016

0.511

Don’t work

0.821

0.518–1.302

0.402

1.066

0.625–1.820

0.814

Passive smoking during childhood

Exposed

1.330

0.937–1.887

0.111

1.226

0.847–1.775

0.280

Exposure to biomass smoke for heating£

Never heat the home (reference)

1

  

1

  

Exposed

2.342

1.179–4.650

0.015

2.743

1.338–5.626

0.006

Not exposed

0.982

0.684–1.408

0.920

1.032

0.711–1.500

0.867

  1. Bold indicates burden of obstructive lung disease
  2. OR Odds ratio, CI Confidence interval
  3. §Ever worked in a dusty job for at least 1 year
  4. £Exposure to indoor open fire with wood, coal or drop residue as a primary means of heating home for at least 6 months
Back to article page

BMC Pulmonary Medicine

ISSN: 1471-2466

Contact us