Variables		Anxiety
		Yes		No		p (Khi-2)
		n	%	n	%	p (Khi-2)
Age (years)	6 - 9	2	04.1	55	36.2	<0.001
	10 - 12	3	06.1	48	31.6
	13 - 15	20	40.8	27	17.8
	16 - 19	24	49.0	22	14.5
Duration of illness (years)	0 - 5	8	16.3	59	38.8	<0.001*
	6 - 10	14	28.6	62	40.8
	11 - 15	21	42.9	22	14.5
	16 - 18	6	12.2	9	5.9
School performance	Low	20	40.8	34	22.4	0.027
	Mean	21	42.9	75	49.3
	Good	8	16.3	43	28.3
School delay	No	33	67.3	136	89.5	0.001
School delay	Yes	16	32.7	16	10.5	0.001
School absenteeism	No	38	77.6	120	78.9	0.843
School absenteeism	Yes	11	22.4	32	21.1	0.843
Pubertal delay (n = 144)	No	45	91.8	94	98.9	0.045*
Pubertal delay (n = 144)	Yes	4	8.2	1	1.1	0.045*
Blood transfusion concept	No	5	10.2	28	18.4	0.194
Blood transfusion concept	Yes	44	89.8	124	81.6	0.194
Taking hydroxyurea	No	36	73.5	132	86.8	0.044
Taking hydroxyurea	Yes	13	26.5	20	13.2	0.044