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Table 8 IPAQ scale distributional characteristics - assessment new disposable pen (Visit 3) 1

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

Subscale/Total Score

N

Mean

SD

Floor (%)

Ceiling (%)

Range

Overall ease of use

134

82.6

23.8

1 (0.7%)

75 (56.0%)

0.0-100.0

Preparing pen

134

90.9

12.6

0 (0.0%)

64 (47.8%)

37.5-100.0

Setting the dose

134

92.5

14.5

0 (0.0%)

93 (69.4%)

25.0-100.0

Injecting the medicine

134

80.6

21.5

0 (0.0%)

47 (35.1%)

25.0-100.0

Maintaining the pen

134

86.2

21.9

0 (0.0%)

87 (64.9%)

12.5-100.0

Total IPAQ score

134

87.5

13.2

0 (0.0%)

30 (22.4%)

37.5-100.0

  1. 1Ceiling indicates “Very Easy” for all items in a subscale and floor indicates “Very Difficult” for all items in a subscale.