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Table 9 IPAQ internal consistency reliability

From: Psychometric Assessment of the Injection Pen Assessment Questionnaire (IPAQ): measuring ease of use and preference with injection pens for human growth hormone

 

Genotropin® Pen1

New Disposable Pen2

# of Items

Cronbach’s Alpha

# of Items

Cronbach’s Alpha

Overall ease of use

1

---

1

---

Preparing the pen

4

0.70

4

0.68

Setting the dose

3

0.58

3

0.53

Injecting the medicine

4

0.73

4

0.82

Maintaining the pen

2

0.65

2

0.65

Total IPAQ score

13

0.85

13

0.85

  1. 1 N = 136, Visit 1.
  2. 2 N = 134, Visit 3.
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Health and Quality of Life Outcomes

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