Table 2. Descriptive statistics of the study sample.

	Overall N = 214	Boys N = 108	Girls N = 106
	Mean (SD) Percentage	Mean (SD) Percentage	Mean (SD) Percentage
Age	4.28 (1.47)	4.25 (1.57)	4.31 (1.37)
HRQoL	69.54 (16.63)	66.70 (17.33)	72.39 (15.94)
Area of education(kindergarten 1 = St Gallus)	29.0%	26.9%	31.1%
Area of education (kindergarten 2 = St Pius)	19.5%	23.1%	16.0%
Area of education(kindergarten 3 = St Fidelis)	19.6%	19.4%	19.8%
Area of education(kindergarten 4 = St Martin)	14.7%	13.5%	16.0%
Area of education(kindergarten 5 = St Michael)	16.8%	16.7%	17.0%
Professionals with advanced qualifications	17.2%	15.6%	18.8%
Professionals	11.1%	10.4%	11.8%
Skilled workers	43.5%	45.8%	41.2%
Unskilled workers	15.0%	13.5%	16.5%
Unemployed	13.2%	14.6%	11.8%
Symptom status (with symptoms)	6.5%	4.6%	8.5%
Development status	4.49 (1.13)	4.27 (1.00)	4.71 (1.26)
Individual behavior	4.58 (2.24)	4.14 (2.08)	5.03 (2.41)