Results of a human factors experiment of the usability and patient acceptance of a new autoinjector in patients with rheumatoid arthritis.

Concerning the other parameters of patient device acceptance (ie, perceived ease of use and simplicity of the process in three steps; ease and usefulness in detecting the remaining drug; and willingness to recommend the tested autoinjector to someone else and to accept a further treatment by self-injections with the tested autoinjector), age group seems to impact the mean device acceptance score to the greatest degree (see Table 6 ), and previous experience in self-injection has an effect that approaches statistical significance ( P =0.05) for ease of use.

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Overall patient device acceptance (Q1, Q2, and Q3) was also high (81.5%) in phase 2, but these scores did not reach statistical significance ( P =0.451) ( Table 4 ).

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