Table 1.
Polish children and adolescents (the OLAF study sample) mean height z-scores relative to the six references and statistical testing
| reference | N | Mean | 95% CI | SD | p | Min. | Max. |
|---|---|---|---|---|---|---|---|
| boys | |||||||
| WHO 2007 | 6227 | 0.50 | 0.47 0.52 | 0.99 | <.0001 | -3.03 | 4.37 |
| USCDC2000 | 6227 | 0.45 | 0.43 0.48 | 0.97 | <.0001 | -2.79 | 4.02 |
| Krakow | 6227 | 0.17 | 0.15 0.20 | 1.02 | <.0001 | -3.37 | 3.85 |
| Warszawa | 6227 | 0.08 | 0.05 0.11 | 1.06 | <.0001 | -3.63 | 4.07 |
| Poznan | 6227 | 0.05 | 0.03 0.08 | 1.09 | 0.0001 | -3.73 | 4.08 |
| Lodz | 6227 | 0.14 | 0.11 0.16 | 1.04 | <.0001 | -3.66 | 3.88 |
| girls | |||||||
| WHO 2007 | 6558 | 0.34 | 0.32 0.37 | 0.95 | <.0001 | -3.47 | 4.29 |
| USCDC2000 | 6558 | 0.33 | 0.31 0.36 | 0.94 | <.0001 | -3.03 | 3.95 |
| Krakow | 6558 | 0.09 | 0.07 0.12 | 1.03 | <.0001 | -3.34 | 4.33 |
| Warszawa | 6558 | 0.01 | -0.02 0.03 | 1.05 | 0.6338 | -3.73 | 4.19 |
| Poznan | 6558 | -0.06 | -0.09-0.03 | 1.11 | <.0001 | -3.86 | 4.57 |
| Lodz | 6558 | 0.15 | 0.13 0.18 | 1.03 | <.0001 | -3.49 | 4.43 |