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Table 2 Linear mixed effect models: CO and FEV1

From: Acute effects of cigarette smoking on inflammation in healthy intermittent smokers

Independent variable

Time interval

B

95% CI

P value

CO, ppm

0–1 hour

3.61

2.67–4.54

<0.0001

 

1–12 hours

-0.29

-0.38 – -0.21

<0.0001

FEV1, L/sec

0–1 hour

0.06

-0.07–0.20

0.38

  1. The time intervals of the above parameters were selected based on visual inspection of the plots. The slopes of the parameters were estimated using linear mixed effect models [11] by including the variables time (hours), smoking (yes or no) and their interaction. B: regression coefficient for the variable time (for further information see the method section). CO: carbon monoxide; FEV1: Forced Expiratory Volume in 1 second.
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Respiratory Research

ISSN: 1465-993X

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