Table 5 Logistic regression analyses for mild idiopathic interstitial pneumonias.

From: Simple method for detecting idiopathic interstitial pneumonias by measuring vertical lung length on chest X-ray

Variables

Odds ratio

p value

Odds ratio

p value

Odds ratio

p value

Odds ratio

p value

Age

0.99 (0.96–1.02)

0.397

0.99 (0.97–1.02)

0.507

0.98 (0.96–1.01)

0.280

0.99 (0.96–1.01)

0.304

Sex, male

1.40 (0.72–2.71)

0.324

0.70 (0.38–1.30)

0.266

1.21 (0.61–2.40)

0.589

0.69 (0.35–1.35)

0.277

BMI

0.84 (0.77–0.92)

< 0.001

1.01 (0.94–1.08)

0.815

0.82 (0.74–0.90)

< 0.001

0.93 (0.86–1.00)

0.038

FVC%pred

0.97 (0.94–1.01)

0.132

0.94 (0.91–0.97)

< 0.001

0.97 (0.94–1.01)

0.123

0.95 (0.92–0.99)

0.007

FEV1%pred

0.99 (0.96–1.02)

0.523

0.99 (0.96–1.03)

0.725

1.00 (0.96–1.03)

0.849

1.00 (0.97–1.04)

0.986

%LAA

0.98 (0.96–1.01)

0.155

0.98 (0.96–1.00)

0.039

0.98 (0.96–1.00)

0.120

0.98 (0.96–1.00)

0.061

tVLL

0.93 (0.91–0.95)

< 0.001

Ā Ā Ā Ā Ā Ā 

uVLL

Ā Ā 

1.05 (1.01–1.10)

0.016

Ā Ā Ā Ā 

lVLL

Ā Ā Ā Ā 

0.90 (0.88–0.92)

< 0.001

Ā Ā 

l/uVLL ratio

Ā Ā Ā Ā Ā Ā 

1.14 × 10–2 (0.34 × 10–2–0.38 × 10–1)

< 0.001

  1. Data expressed as odds ratio (95% confidence interval). Odds ratios for continuous variables expressed as per 1 value increase.
  2. BMI body mass index, FEV1%pred percentage predicted forced expiratory volume in 1s, FVC%pred percentage predicted forced vital capacity, tVLL total vertical lung length, uVLL upper vertical lung length, lVLL lower vertical lung length, %LAA percentage low-attenuation area.