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Table 5 Comparison of baseline (before training) pulmonary function test parameters, 6-min walk distance, modified Medical Research Council scale scores, and Chronic obstructive pulmonary disease Assessment Test scores with those at 1 month after inhaler use training in the correct and incorrect technique groupsa

From: Cognitive impairment according to Montreal Cognitive Assessment independently predicts the ability of chronic obstructive pulmonary disease patients to maintain proper inhaler technique

Correct group (n = 31)

Incorrect group (n = 35)

Variables

Baseline

1 month

p-value

Variables

Baseline

1 month

p-value

PFTs (n = 27)b

   

PFTs (n = 31)b

   

 FEV1 (L)

1.3 ± 0.4

1.4 ± 0.4

0.147

 FEV1 (L)

1.2 ± 0.4

1.3 ± 0.4

0.380

 FVC (L)

2.6 ± 0.5

2.7 ± 0.5

0.194

 FVC (L)

2.4 ± 0.5

2.5 ± 0.5

0.226

 FEV1/FVC (%)

50.5 ± 12.1

50.9 ± 12.3

0.547

 FEV1/FVC (%)

50.7 ± 11.4

50.4 ± 11.5

0.652

 SVC (L)

2.7 ± 0.5

2.7 ± 0.5

0.317

 SVC (L) (n = 30)

2.4 ± 0.5

2.5 ± 0.5

0.242

 IC (L)

1.8 ± 0.4

1.8 ± 0.4

0.474

 IC (L) (n = 30)

1.6 ± 0.5

1.7 ± 0.5

0.014*

mMRC scale score

1.2 ± 1.3

1.4 ± 1.3

0.395

mMRC scale score

1.3 ± 1.2

1.4 ± 1.2

0.711

CAT score

11.4 ± 8.9

8.4 ± 5.5

0.018*

CAT score

11.1 ± 7.3

10.7 ± 7.4

0.655

6 MWDb (n = 26)

351 ± 93

372 ± 92

0.009*

6 MWDb (n = 30)

310 ± 103

310 ± 103

0.998

  1. Data are presented as mean ± standard deviation unless otherwise indicated
  2. *p < 0.05 according to paired t-test
  3. aThe correct group included patients who correctly performed all the critical steps for at least one device containing a bronchodilator. The incorrect group included patients who incorrectly performed the techniques for all prescribed devices containing bronchodilators at 1 month after training
  4. bFour patients in each group did not consent to undergo PFTs, and 5 patients in each group did not consent to the measurement of 6 MWD