Table 2 Associations of post-bronchodilator forced vital capacity/total lung capacity (FVC/TLCCT) quartiles at enrollment with mortality in smokers with Preserved Ratio Impaired Spirometry (PRISm; n = 960).

From: Low FVC/TLC in Preserved Ratio Impaired Spirometry (PRISm) is associated with features of and progression to obstructive lung disease

Quartile

FVC/TLCCT

HR

2.5%

9.75%

P value

Very High

ref

ref

ref

ref

High

2.12

1.09

4.13

0.028

Low

1.68

0.84

3.36

0.14

Very Low

1.87

0.89

3.87

0.10

  1. Cox Hazard regression models with post-bronchodilator FVC/TLCCT quartiles as independent variables (exposure) and mortality as the dependent variable(outcome) were performed.
  2. All models for mortality included the following co-variates: age, sex, race, smoking status, smoking pack-years, body mass index (BMI), history of asthma and congestive heart failure, and diabetes mellitus.
  3. HR = Hazard Ratio.
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