Table 3 Patient-reported satisfaction with categories of inhaler device attributes

Drug Delivery Satisfaction

I get the same amount of medicine delivered to my lungs each time

• Mean (SD)

3.79 (0.88)

• Range

1-5

• Median

4

• IQR

3, 4

I do not need to breathe in hard to inhale my medicine

• Mean (SD)

3.58 (1.02)

• Range

1-5

• Median

4

• IQR

3, 4

Low/no irritation in mouth and throat

• Mean (SD)

3.45 (1.07)

• Range

1-5

• Median

3

• IQR

3, 4

I do not need to breathe in at the same time as I press my inhaler

• Mean (SD)

3.42 (1.12)

• Range

1-5

• Median

3

• IQR

3, 4

Device Functionality

The instructions are simple and easy to use

• Mean (SD)

4.05 (0.83)

• Range

1-5

• Median

4

• IQR

4, 5

It is built to last and will not break easily

• Mean (SD)

3.94 (0.83)

• Range

1-5

• Median

4

• IQR

3, 5

No need for me to put the medicine in the inhaler before I use it

• Mean (SD)

3.97 (0.95)

• Range

1-5

• Median

4

• IQR

3, 5

Easy to hold and carry around with me

• Mean (SD)

3.87 (0.92)

• Range

1-5

• Median

4

• IQR

3, 5

Can reuse the inhaler for more than one month

• Mean (SD)

2.89 (1.36)

• Range

1-5

• Median

3

• IQR

2, 4

Device Feedback Satisfaction

It tells me how many doses of medicine I have left

• Mean (SD)

3.72 (1.14)

• Range

1-5

• Median

4

• IQR

3, 5

The inhaler locks when empty so it cannot be used anymore

• Mean (SD)

3.08 (1.32)

• Range

1-5

• Median

3

• IQR

2, 4

It tells me when my dose of medicine has been inhaled correctly

• Mean (SD)

3.06 (1.27)

• Range

1-5

• Median

3

• IQR

2, 4