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Table 3 Users’ acceptability of myfood24 before and after making the amendments

From: Formative evaluation of the usability and acceptability of myfood24 among adolescents: a UK online dietary assessments tool

Acceptability questions

Versiona

Acceptability (5-point Likert Items)

Median

IQRb

P-value c

Strongly disagree

Somewhat disagree

Neutral

Somewhat agree

Strongly agree

Time for completion was reasonable

B (n.14)

0

2 (14 %)

4 (29 %)

8 (57 %)

0

4

3,4

0.004

L (n.70)

1 (1 %)

4 (6 %)

9 (13 %)

26 (37 %)

30 (43 %)

4

4,5

Terminology used was easy

B (n.14)

0

1 (7 %)

3 (21 %)

5 (36 %)

5 (36 %)

4

3,4

0.716

L (n.70)

1 (1 %)

5 (7 %)

10 (14 %)

26 (37 %)

28 (41 %)

4

4,5

I like the design and layout of myfood24

B (n.14)

0

2 (14 %)

2 (14 %)

5 (36 %)

5 (36 %)

4

3,5

0.032

L (n.70)

0

4 (6 %)

13 (19 %)

33 (46 %)

20 (29 %)

4

4,5

Food searching was simple and efficient

B (n.14)

3 (21 %)

4 (29 %)

2 (14 %)

4 (29 %)

1 (7 %)

3

2,4

0.047

L (n.70)

0

12 (17 %)

24 (34 %)

25 (36 %)

9 (13 %)

3

3,5

Make a list function was useful

B (n.14)

1 (7 %)

3 (21 %)

4 (29 %)

5 (36 %)

1 (7 %)

3

2,4

0.002

L (n.64)

0

3 (5 %)

11 (17 %)

35 (55 %)

15 (23 %)

4

4,5

Selecting food portion size was easy

B (n.14)

1 (7 %)

1 (7 %)

7 (50 %)

5 (36 %)

0

3

3,4

0.045

L (n.70)

1 (1 %)

11 (16 %)

15 (21 %)

20 (29 %)

23 (33 %)

4

4,5

Add home cooked recipe was straight forward

B (n.14)

2 (14 %)

3 (21 %)

8 (57 %)

1 (1 %)

0

3

2,4

0.273

L (n.48)

2 (4 %)

8 (17 %)

16 (33 %)

16 (33 %)

6 (13 %)

3

3,4

Correcting my mistakes was easy

B (n.14)

0

2 (14 %)

5 (36 %)

4 (29 %)

3 (21 %)

3.5

3,4

0.026

L (n.66)

0

3 (5 %)

10 (15 %)

24 (36 %)

29 (44 %)

4

4,5

  1. aB beta version, L live version
  2. b(IQR) interquartile range
  3. cMann–Whitney U-test comparing beta and live version results