Table 1.
Sociodemographic characteristics of the KiGGS sample (baseline 2003‒2006), participants aged 11 to 17 years (n = 6813).
| Total (%) | Boys (%) | Girls (%) | |
|---|---|---|---|
| Age in years: mean (SD) | 14.4 (2.00) | 14.3 (1.97) | 14.4 (2.03) |
| Sex | 6813 (100.0) | 3492 (51.3) | 3321 (48.7) |
| Region of residence | |||
| Newly formed German states (incl. Berlin) | 2278 (33.4) | 1148 (32.9) | 1130 (34.0) |
| Old West German states | 4535 (66.6) | 2344 (67.1) | 2191 (66.0) |
| Migration background | |||
| Yes | 1054 (15.5) | 557 (16.0) | 497 (15.0) |
| No | 5755 (84.5) | 2934 (84.0) | 2821 (84.9) |
| Missing data | 4 (0.1) | 1 (0.0) | 3 (0.1) |
| Self-rated health | |||
| Very good | 1245 (18.3) | 730 (20.9) | 515 (15.5) |
| Good | 3365 (49.4) | 1680 (48.1) | 1685 (50.7) |
| Fair | 758 (11.1) | 342 (9.8) | 416 (12.5) |
| Poor | 29 (0.4) | 16 (0.5) | 13 (0.4) |
| Very poor | 2 (0.0) | 1 (0.0) | 1 (0.0) |
| BMI classes | |||
| Underweight | 510 (7.5) | 281 (8.0) | 229 (6.9) |
| Normal weight | 5063 (74.3) | 2578 (73.8) | 2485 (74.8) |
| Overweight | 692 (10.2) | 364 (10.4) | 328 (9.9) |
| Obese | 515 (7.6) | 254 (7.3) | 261 (7.9) |
| Missing data | 33 (0.5) | 15 (0.4) | 18 (0.5) |
| SES | |||
| Low | 1777 (26.1) | 916 (26.2) | 861 (25.9) |
| Medium | 3192 (46.9) | 1625 (46.5) | 1567 (47.2) |
| High | 1609 (23.6) | 816 (23.4) | 793 (23.9) |
| Missing data | 235 (3.4) | 135 (3.9) | 100 (3.0) |
| Type of school | |||
| Secondary general school | 1150 (16.9) | 680 (19.5) | 470 (14.2) |
| Intermediate/Comprehensive school | 2586 (38.0) | 1329 (38.1) | 1257 (37.9) |
| Grammar school | 2299 (33.7) | 1033 (29.6) | 1266 (38.1) |
| Other school types | 550 (8.1) | 325 (9.3) | 225 (6.8) |
| Missing data | 228 (3.3) | 125 (3.6) | 103 (3.1) |
SD = standard deviation; BMI = body mass index; SES = socio-economic status; Percentages based on weighted data; extrapolated to the residential population of Germany (0‒17 years) on 31 December 2004 (without missing data).