Consumption of energy drinks among adolescents in Norway: a cross-sectional study

BMC Public Health

Table 1 Descriptive sample characteristics in a study on ED consumption in Norwegian adolescents.

Variable	n (%)
School level
Lower secondary school^a	19,268 (62.0)
Upper secondary school^b	11,823 (38.0)
Grade
8	6316 (20.3)
9	6117 (19.7)
10	6469 (20.8)
11	4934 (15.9)
12	4118 (13.2)
13	2705 (8.7)
Missing	432 (1.4)
Gender
Female	15,530 (50.0)
Male	14,581 (46.9)
Missing	980 (3.1)
Residency^c
Urban	14,394 (46.3)
Rural	16,697 (53.7)
Frequency of physical activity^d
Often	25,791 (83.0)
Seldom	4351 (14.0)
Never	573 (1.8)
Missing	376 (1.2)
Leisure screen time
Less than two hours	6755 (21.7)
Two-three hours	7117 (22.9)
Three-four hours	7614 (24.5)
Four-six hours	5427 (17.5)
More than six hours	3840 (12.4)
Missing	338 (1.1)
Basis for calculating socioeconomic status index:
See Additional file 1

n = 31,091
^aLower secondary school includes grades 8–10 and ages 12–15 years ^b Upper secondary school includes grades 11–13 and ages 15–19 years ^c Urban residency: municipalities with ≥ 20,000 residents, rural residency: municipalities with < 20,000 residents^{. d} Often: once a week or more, seldom: once to twice a month or less

ISSN: 1471-2458