Table 1

Sample description1

Variable

Girls (n = 3 238)

Boys (n = 3 392)

Total (n = 6 630)


Age: M (SE)

14.62 (0.023)

14.62 (0.024)

14.62 (0.018)


Percentage body fat: M (SE)

26.26 (0.181) ***

19.39 (0.230) ***

22.74 (0.166)


Region: n (%)


East (former GDR)

1099 (18.4)

1111 (18.5)

2210 (18.5)

West (former FRG)

2139 (81.6)

2281 (81.5)

4420 (81.5)


Socioeconomic status (SES): n (%)


low

883 (27.8)

945 (28.2)

1828 (28.0)

medium

1568 (47.5)

1635 (46.8)

3203 (47.1)

high

787 (24.7)

812 (24.9)

1599 (24.8)


Migrant background: n (%)


non-migrant

2747 (82.6)

2851 (82.3)

5598 (82.5)

migrant

488 (17.4)

540 (17.7)

1028 (17.5)


Pubic hair stage***: n (%)


prepubescent (stage 1)

181 (4.9)

239 (6.0)

420 (5.5)

early/mid-puberty (stage 2-3)

476 (13.1)

971 (26.0)

1447 (19.7)

advanced/mature (stage 4-6)

2531 (82.0)

2108 (67.9)

4639 (74.8)


Menarche (girls)/voice change (boys): n (%)


regular menses/deep voice

1685 (54.8)

1307 (44.1)

n/a

irregular menses/fluctuating voice

627 (20.6)

788 (22.9)

n/a

no menses/no change

904 (24.6)

1242 (33.1)

n/a


Relative pubertal timing**: n (%)


early

696 (20.8)

623 (17.2)

1319 (19.0)

average

1845 (59.7)

2013 (63.5)

3858 (61.7)

late

640 (19.5)

670 (19.2)

1310 (19.3)


Body dissatisfaction (BDS) ***: n (%)


much too thin

56 (1.7)

103 (3.1)

159 (2.4)

too thin

243 (7.2)

547 (17.1)

790 (12.3)

exactly right weight

1169 (36.4)

1519 (44.5)

2688 (40.5)

too fat

1419 (44.5)

1021 (30.6)

2440 (37.4)

much too fat

318 (10.1)

158 (4.7)

476 (7.3)


PA frequency***: n (%)


nearly every day

582 (17.5)

987 (28.3)

1569 (23.0)

3-5 times/week

833 (26.5)

1201 (36.6)

2034 (31.7)

about 1-2 times/week

1104 (35.0)

831 (25.0)

1935 (29.9)

about 1-2 times/month

238 (7.3)

118 (3.8)

356 (5.5)

never

435 (13.9)

194 (6.3)

629 (10.0)


1Some values of categorical variables do not sum up to n = 6 630 because of individual missing values; n = total number unweighted, % = percent of weighted sample; M = mean; SE = standard error of mean adjusted for the sampling plan.

PA = physical activity

*** boys and girls significantly different, p ≤ .001

** boys and girls significantly different, p ≤ .01

Finne et al. International Journal of Behavioral Nutrition and Physical Activity 2011 8:119   doi:10.1186/1479-5868-8-119

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