Table 2.
Descriptive characteristics of study participants (n = 367) by means of frequencies, mean (SD) and median (IQR)
| Girls | Boys | Children | Adolescents | Total | |
|---|---|---|---|---|---|
|
Population (%) |
192 (52.3) |
175 (47.7) |
219 (59.7) |
148 (40.3) |
367 (100) |
|
Mean age (SD) |
13.2 (1.2) |
13.1 (1.1) |
12.4 (0.7) |
14.3 (0.7) |
13.2 (1.2) |
|
Mean BMI (SD)
a
|
18.9 (3.3) |
18.6 (3.0) |
18.4 (3.3) |
19.3 (2.8) |
18.8 (3.2) |
|
Parental employment status
b
|
|
|
|
|
|
| Both parents employed (%) |
98 (52.7) |
100 (59.2) |
117 (55.5) |
81 (56.3) |
198 (55.8) |
| One or both unemployed (%) |
88 (47.3) |
69 (40.8) |
94 (44.5) |
63 (43.7) |
157 (44.2) |
|
Ethnicity
c
|
|
|
|
|
|
| Danish background (%) |
61 (32.4) |
73 (42.4) |
81 (37.5) |
53 (36.8) |
134 (37.2) |
| Immigrant or descendent (%) |
127 (67.6) |
99 (57.6) |
135 (62.5) |
91 (63.2) |
226 (62.8) |
|
Median daily hours of combined accelerometer and GPS data (IQR) |
12.9 (11.9-13.6) |
12.5 (11.4-13.4) |
12.6 (11.9-13.5) |
12.7 (11.3-13.6) |
12.7 (11.6-13.5) |
| Mean valid days (SD) d | 2.5 (1.1) | 2.5 (1.1) | 2.6 (1.1) | 2.4 (1.0) | 2.5 (1.1) |
Bold: significant difference p < 0.05.
adata missing from 21 participants.
bdata missing from 12 participants.
cdata missing from 7 participants.
dMinimum one valid week day of nine hours of combined accelerometer and GPS data.
BMI, Body Mass Index; GPS, Global Positioning System; IQR, Inter Quartile Range; SD, Standard Deviation.