Table 1.
Characteristics of Swedish adolescent study participants.
| Characteristics | All (n=81) |
Girls (n=50) |
Boys (n=31) |
Thinness/ normal weighta(n=69) |
Overweight/ obesea (n=12) |
|
| Age in years, median (IQRb) | 15.5 (0.5) | 15.5 (0.6) | 15.5 (0.4) | 15.5 (0.5) | 15.6 (0.5) | |
| Weight (kg), median (IQR) | 59.9 (12.5) | 57.4 (9.6)c | 66.1 (15.7)c | 58.0 (9.8)c | 77.2 (17.0)c | |
| Height (cm), median (IQR) | 170.6 (12.9) | 164.9 (13.5)c | 176.5 (12.0)c | 170.0 (12.8) | 172.8 (13.8) | |
| BMId(kg/m2), median (IQR) | 21.1 (3.1) | 21.1 (2.5) | 20.9 (4.1) | 20.7 (2.4)c | 25.8 (1.4)c | |
| BMI z-scorea, median (IQR) | 0.44 (0.84) | 0.38 (0.71) | 0.53 (1.02) | 0.33 (0.76)c | 1.73 (0.37)c | |
| Gender, n (%) |
|
|
|
|
|
|
|
|
Female | 50 (62) | 50 (100) | 31 (100) | 44 (64) | 6 (50) |
|
|
Male | 31 (38) | 0 (0) | 0 (0) | 25 (36) | 6 (50) |
| Weight status a , n (%) |
|
|
|
|
|
|
|
|
Thinness grade 2 | 1 (1) | 0 (0) | 1 (3) | 1 (1) | 0 (0) |
|
|
Thinness grade 1 | 4 (5) | 3 (6) | 1 (3) | 4 (6) | 0 (0) |
|
|
Normal weight | 64 (79) | 41 (82) | 23 (74) | 64 (93) | 0 (0) |
|
|
Overweight | 11 (14) | 6 (12) | 5 (16) | 0 (0) | 11 (92) |
|
|
Obese | 1 (1) | 0 (0) | 1 (3) | 0 (0) | 1 (8) |
|
Parents’ highest education
e
,
n (%) |
|
|
|
|
|
|
|
|
No formal education | 1 (1) | 0 (0) | 1 (3) | 0 (0) | 1 (8) |
|
|
Nine-year compulsory school | 14 (17) | 5 (10) | 9 (29) | 11 (16) | 3 (25) |
|
|
Two-year upper secondary school/folk high school/ vocational training |
8 (10) | 5 (10) | 3 (10) | 6 (9) | 2 (17) |
|
|
At least three-year upper secondary school | 18 (22) | 13 (26) | 5 (16) | 16 (23) | 2 (17) |
|
|
College/university | 40 (49) | 27 (54) | 13 (42) | 36 (52) | 4 (33) |
| Born outside Sweden e , n (%) |
|
|
|
|
|
|
|
|
None | 58 (72) | 38 (76) | 20 (65) | 51 (74) | 7 (58) |
|
|
Only parent(s) | 20 (25) | 11 (22) | 9 (29) | 16 (23) | 4 (33) |
|
|
Only participant | 1 (1) | 0 (0) | 1 (3) | 1 (1) | 0 (0) |
|
|
Participant and parent(s) | 2 (2) | 1 (2) | 1 (3) | 1 (1) | 1 (8) |
aUsing cutoff values according to Cole and Lobstein [25].
bInterquartile range (IQR).
c P<.001, derived from the Mann-Whitney U test of difference between girls and boys or between thinness/normal weight and overweight/obese.
dBody mass index (BMI).
eQuestion answered by the participant when registering as a user in the mobile phone app.