Table 3.
Comparisons between and within adolescents and adults of the number of images acquired prior to obtaining a suitable image.
| Group | Adolescents (n = 63 meal session 1, n = 55 meal session 2) |
Adults (n = 56a meal session 1, n = 24 meal session 2) |
|||||||
| 1 image, n (%) |
>1 image, n (%) |
Data recording errorb, n |
1 image, n (%) |
>1 image, n (%) |
Data recording errorb, n |
||||
| All participants | |||||||||
| Meal session 1 | |||||||||
| Before imagec,d | 38 (62%) | 23 (38%) | 2 | 21 (42%) | 29 (58%) | 6 | |||
| After imagec,e | 44 (75%) | 15 (25%) | 4 | 25 (50%) | 25 (50%) | 6 | |||
| Meal session 2 | |||||||||
| Before image | 39 (77%) | 12 (24%) | 4 | 13 (59%) | 9 (41%) | 2 | |||
| After image | 40 (78%) | 11 (22%) | 4 | 16 (73%) | 6 (27%) | 0 | |||
| Matched participantsf | |||||||||
| Meal session 1 | |||||||||
| Before image | 28 (58%) | 20 (42%)g,h | NAi | 9 (45%) | 11 (55%) | NA | |||
| After imagec,j | 36 (75%) | 12 (25%) | NA | 7 (35%) | 13 (65%) | NA | |||
| Meal session 2 | |||||||||
| Before image | 38 (79%) | 10 (21%)g,h | NA | 12 (60%) | 8 (40%) | NA | |||
| After image | 37 (77%) | 11 (23%) | NA | 14 (70%) | 6 (30%) | NA | |||
a Due to software programming errors, n = 56 instead of 57.
b Data recording error on the part of staff; therefore, numbers not included in percentages, which represent only users’ abilities.
c Comparison between adolescents and adults.
d P = .03.
e P = .008.
f Number of before and after meal images these participants took was recorded for both meal session 1 and meal session 2 (n = 48 session pairs for adolescents; n = 20 session pairs for adults).
g Comparison between meal session 1 (before) and meal session 2 (before) within adolescents.
h P = .04
i Not applicable.
j P = .002.