Table 1 Demographic characteristics of the study population and the control group
Study Population (n = 182) | Control group (n = 361) | |||||
|---|---|---|---|---|---|---|
Mean | SD | Range | Mean | SD | Range | |
Age at study (years) | 21.4* | 2.3 | 17.7–27.8 | 22.2 | 2.5 | 18.0–27.0 |
Age of onset (years) | 3.3 | 2.8 | 0.0–12.0 | |||
Age at intake (years) | 9.2 | 2.4 | 5.1–17.1 | |||
Follow-up duration (years) | 12.1 | 1.8 | 7.0–15.0 | |||
% | N | % | N | |||
Gender | ||||||
Male | 58.2** | 106 | 47.1 | 170 | ||
Female | 41.8 | 76 | 52.9 | 191 | ||
Native Country | ||||||
The Netherlands | 98.9 | 180 | 97.2 | 351 | ||
Other | 1.1 | 2 | 2.8 | 10 | ||