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Table 2 Indicators of use over 26 weeks, presented for three pre-specified groups of users based on their usage activity (N = 171). Of note, non-users are not included in this Table

From: Use and usability of the dr. Bart app and its relation with health care utilisation and clinical outcomes in people with knee and/or hip osteoarthritis

  Logged in, but no further activity
(n = 20)
Chose ≥1 goal, but did not complete goals
(n = 38)
Completed ≥1 goal
(n = 113)
Number of logins, median [IQR] 2.5 [1.5; 4.5] 4 [3; 11] 33 [16; 89]
Length of use, mean days
median days [IQR]
26.1
4.5 [1; 29.5]
66.0
60.5 [6;102]
115.9
144 [63; 173]
SUS score at 3 month follow-up, mean (SD) 65.2 (17.7)
(N = 7)
55.0 (15.1)
(N = 14)
68.6 (16.5)
(N = 72)
SUS score at 6 month follow-up, mean (SD) 51.3 (15.5)
(N = 9)
52.0 (16.2)
(N = 10)
69.2 (16.9)
(N = 63)
Number of paragraphs read (range 0–108), median [IQR] 0 [0; 11.5] 5.5 [1; 21] 42 [18; 84]
Number of unique chosen goals,
median [IQR]
N/A 2 [1; 3] 6 [3; 11]
Number of unique completed goals,
median [IQR]
N/A N/A 5 [3; 10]
Number of total completed goals
median [IQR]
N/A N/A 35 [11; 117]
  1. Abbreviations: IQR interquartile range; SD Standard Deviation; n number; OA osteoarthritis