Table 6 Overview of the results of previous studies

Wong et al. [20]

121

58

92% „acceptable“

(dichotomous scale)

Acceptance lower among > 70 year olds (75% vs. 95%), more frequent requests for support (45% vs. 15%)

Schick-Makaroff et al. [18]

56

66

66%„very satisfied”

7% „satisfied”

2% „slightly satisfied”

18% „neutral”

Not proven

Suzuki et al. [19]

152

64

92% „easy to use“

Older patients needed support more frequently

Koch et al. [17]

80

47 (12–77)

80.25% „very satisfactory “

19.75% „ satisfactory “

1.25% „ unsatisfactory “

Not specified

Ferrari et al. [16]

74

37 (rounded)

97.3% „easy to use”

Not specified

Abernethy et al. [15]

66

55

98% “easy to use”

Not specified

Smith et al. [21]

150

44 (rounded)

Rated 1.3 on a six point scale

(1 = very easy; 6 = very hard)

Not specified

Herrick et al. [22]

841

41 (18–95)

92% “very easy” to use

Older patients needed support more frequently

Benaroia et al. [23]

67

34

83% “very easy” to use

Not specified

Arora et al. [1]

173

–

93% easy to use

Not specified

Hess et al. [10]

10,999

47

84% “no difficulty”

Older patients were more likely to report difficulties with the usage

Weiner et al. [11]

82

93% very easy

Not specified