Table 1.
Descriptive statistics of the study sample for selected covariates, total and by sex
| Total | Boys | Girls | |||||
|---|---|---|---|---|---|---|---|
| n | (%) | n | (%) | n | (%) | ||
| Sex | Boys | 1441 | (51.2) | ||||
| Girls | 1374 | (48.8) | |||||
| Study | GINIplus observation | 835 | (29.7) | 411 | (28.5) | 424 | (30.9) |
| GINIplus intervention | 923 | (32.8) | 463 | (32.1) | 460 | (33.5) | |
| LISAplus | 1057 | (37.6) | 567 | (39.4) | 490 | (35.7) | |
| Study location | Munich | 1553 | (55.2) | 799 | (55.5) | 754 | (54.9) |
| Wesel | 836 | (29.7) | 417 | (28.9) | 419 | (30.5) | |
| Bad Honnef | 148 | (5.3) | 76 | (5.3) | 72 | (5.2) | |
| Leipzig | 278 | (9.9) | 149 | (10.3) | 129 | (9.4) | |
| Parental education | Low | 160 | (5.9) | 86 | (6.2) | 74 | (5.6) |
| Medium | 706 | (26.0) | 364 | (26.3) | 342 | (25.7) | |
| High | 1850 | (68.1) | 936 | (67.5) | 914 | (68.7) | |
| Single parent family | Yes | 328 | (11.8) | 167 | (11.8) | 161 | (11.9) |
| No | 2443 | (88.2) | 1254 | (88.3) | 1189 | (88.1) | |
| Parental history of atopic diseases | 0 | 1106 | (42.7) | 563 | (42.8) | 543 | (42.7) |
| 1 | 1124 | (43.4) | 575 | (43.7) | 549 | (43.2) | |
| 2 | 358 | (13.8) | 179 | (13.6) | 179 | (14.1) | |
| mean | (sd) | mean | (sd) | mean | (sd) | ||
| Age | 10.2 | (0.4) | 10.2 | (0.4) | 10.2 | (0.4) | |
| BMI | 17.4 | (2.5) | 17.4 | (2.5) | 17.4 | (2.5) | |
| Season adjusted vitamin D [nmol/l] | 74.2 | (23.3) | 75.2 | (23.8) | 73.1 | (22.8) | |
| 1. quartile | 2. quartile | 3. quartile | 4. quartile | ||||
| Season adjusted Vitamin D [nmol/l] | <57.9 | 57.9- <71.5 | 71.5- <87.8 | 87.8 or higher | |||