Table 4 Univariate and multivariate analyses of FVC and FEV1 in obese patients without asthma versus non-obese patients without asthma and obese patients with asthma versus non-obese patients with asthma.

From: Obesity affects pulmonary function in Japanese adult patients with asthma, but not those without asthma

Obese versus non-obese in patients without asthma

Univariate analysis

Obese versus non-obese in patients with asthma

Univariate analysis

β

95% CI

p value

β

95% CI

p value

FVC (L)

− 0.03

− 0.07–0.01

0.14

FVC (L)

0.23

0.09–0.36

 < 0.01

FEV1 (L)

− 0.02

− 0.05–0.01

0.23

FEV1 (L)

0.26

0.14–0.38

 < 0.01

Obese versus non-obese in patients without asthma

Multivariate analysis*

Obese versus non-obese in patients with asthma

Multivariate analysis†

β

95% CI

p value

β

95% CI

p value

FVC (L)

0.00

− 0.03–0.03

1.0

FVC (L)

0.12

0.02–0.22

0.02

FEV1 (L)

0.01

− 0.01–0.03

0.5

FEV1 (L)

0.13

0.05–0.22

 < 0.01

  1. FVC, forced vital capacity; FEV1, forced expiratory volume in 1 s; CI, confidence interval.
  2. *FVC and FEV1 were individually adjusted by confounding factors including age, sex, and smoking history.
  3. †FVC and FEV1 were individually adjusted by confounding factors including age, sex, smoking history and dose of ICS.
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