Table 2.

Descriptive statistics and reliability estimates on QoLISSY scale level for the US sample in comparison with the European sample (children)

Children	Descriptive statistics						Reliability
	N	Mean	SD	Skewness	% Floor	% Ceiling	N	α	Split-half	ICC
Physical*	49	75.54	19.89	−0.91	2.0	8.2	48	0.85	0.87	0.82
US sample
European sample	268	73.69	20.08	−0.95	0.4	12.3	263	0.84	0.83	0.80
Social*	50	71.42	20.72	0.21	2.0	8.0	49	0.92	0.94	0.69
US sample
European sample	268	72.94	22.93	−0.79	0.4	10.4	265	0.87	0.83	0.80
Emotional*	50	73.13	19.35	−0.84	2.0	10.0	49	0.89	0.95	0.48
US sample
European sample	268	72.69	23.87	−0.94	1.1	10.1	259	0.88	0.88	0.85
Coping	48	50.46	20.61	0.25	2.1	2.1	45	0.57**	0.53	0.77
US sample
European sample	257	55.60	22.38	−0.19	1.2	1.2	244	0.82	0.65	0.56
Beliefs	49	69.34	27.40	−0.75	2.0	22.4	49	0.87	0.87	0.59
US
European sample	266	69.13	28.59	−0.78	3.8	21.1	263	0.85	0.85	0.83
Treatment	43	49.82	19.06	0.32	2.3	2.3	41	0.84	0.70	0.67
US
European sample	152	55.12	21.06	−0.13	0.7	0.7	143	0.87	0.74	0.73
QoL Total Score	49	73.75	21.35	−0.82	2.0	2.0	47	0.96	0.93	0.72
US sample
European sample	268	73.10	21.39	−0.80	0.4	4.9	251	0.95	0.92	0.88

*The QoL total Score is the sum of the physical, social and emotional scale.

**If item three is deleted, Cronbachs alpha would be 0.81.