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Table 4 Relativity between PIFR0 and clinical indicators

From: Optimizing inhalation therapy in the aspect of peak inhalation flow rate in patients with chronic obstructive pulmonary disease or asthma

Clinical indicators

p value

R (95% CI)

Sex

0.061

−0.130 (−0.261, 0.016)

BMI

0.312

0.071 (−0.076, 0.248)

FEV1

0.013*

0.199 (0.072, 0.351)

FEV1, %predicted

0.900

−0.010 (−0.172, 0.149)

FEV1/FVC

0.948

0.005 (−0.149, 0.169)

PEF

0.008*

0.218 (0.097, 0.356)

IC

0.001*

0.284 (0.097, 0.422)

RV/TLC

0.255

−0.098 (−0.296, 0.084)

CAT

0.632

−0.047 (−0.230, 0.162)

mMRC

0.005*

−0.200 (−0.346, −0.044)

  1. Except for FEV1 (%predicted), which is the percentage of predicted value, the other pulmonary function parameters are absolute values
  2. r, Spearman rank correlation coefficient; BMI, body mass index; FEV1, forced expiratory volume in 1 s; FEV1%, FEV1/predicted FEV1; FEV1/FVC, forced expiratory volume in 1 s/forced vital capacity; PEF, peak expiratory flow; IC, inspiratory capacity; RV/TLC, residual volume/total lung capacity; CAT, COPD Assessment Test; mMRC, Medical Research Council Dyspnea Scale.
  3. *p value < 0.05
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BMC Pulmonary Medicine

ISSN: 1471-2466

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