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Table 3 Differences between the optimised and nonoptimised diary

From: Optimising the validity and completion of adherence diaries: a multiple case study and randomised crossover trial

Conceptual basis

Diary element

Optimised diary

Nonoptimised diary

Diary complexity

Data per page

1 month

3–4 days

Length

1–2 × A4 page

12 × A4 pages

Format

Single sheet

Stapled booklet

Spaces per day

1

6

Type of data collected

Numerical

Yes/No

Numerical

Text (comments)

Information required if have not walked

Single zero

Circling 3 ‘No’s

Diary salience

User-friendliness of design

Simple clean lines

Excessive lines and text

No unnecessary text

Complex grid

Font size 14

No accents for key information

Study logos

Font size 11

Takes up less space

No logo or image

Displays weekly progress

Booklet hinders ability to see progress over weeks