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Table 1 Sample description1

From: Age, puberty, body dissatisfaction, and physical activity decline in adolescents. Results of the German Health Interview and Examination Survey (KiGGS)

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)
  1. 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.
  2. PA = physical activity
  3. *** boys and girls significantly different, p ≤ .001
  4. ** boys and girls significantly different, p ≤ .01