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Table 2 Comparison of electronic versus self-reported adherence by age group, sex, time in study and cognition

From: Self-reported adherence with the use of a device in a clinical trial as validated by electronic monitors: the VIBES study

 

Electronic Adherence

Self-Reported Adherence

Subgroup

Possible Days

Days Recorded*

Mean (± SD)

Days Reported†

Mean (± SD)

Overall

 

42,098

31,902

0.76 (± 0.23)

32,678

0.78 (± 0.23)

Age Group

Age < 84

22,001

17,271

0.78 (±0.20)

17,496

0.79 (± 0.19)

 

Age ≥ 84

20,097

14,631

0.74 (±0.26)

15,182

0.77 (± 0.26)

Gender

Male

14,680

10,969

0.76 (±0.25)

11,247

0.78 (± 0.26)

 

Female

27,418

20,933

0.76 (±0.22)

21,431

0.78 (± 0.21)

Time in Study

6 - <9 Months

6,830

5,378

0.79 (±0.22)

5,440

0.80 (± 0.22)

 

9 - <12 Months

7,452

5,358

0.73 (±0.27)

5,622

0.76 (± 0.26)

 

12 Months

27,816

21,166

0.76 (±0.22)

21,616

0.78 (± 0.22)

Short Blessed Test Score

< 2 (Median)

17,889

14,001

0.78 (±0.20)

14,287

0.80 (± 0.19)

 

≥ 2 (Median)

24,209

17,901

0.75 (±0.25)

18,391

0.77 (± 0.25)

  1. *refers to the actual number of days recorded using the electronic monitor.
  2. †refers to actual number of days recorded as being adherent on the self-reported log book.
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BMC Medical Research Methodology

ISSN: 1471-2288

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