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. 2011 Apr 7;11:54. doi: 10.1186/1471-244X-11-54

Table 1.

Sample size * and Age°, divided by family status, gender, and centre

		*Probands*				*Siblings*				*All*

		*Male*	*Female*	*All*	*Sig ^§*	*Male*	*Female*	*All*	*Sig ^§*	*Male*	*Female*	*All*	*Sig ^§*

BEL_G	N	27	5	32		36	13	49		63	18	81
	Age(m)	10.7	12.2	10.9		11	9.1	10.5		10.9	9.9	10.7
	Age(SD)	2.8	1.6	2.7		3.3	3.1	3.3		3.1	3.1	3.1

ENG_L/S	N	164	15	179		122	130	252		286	145	431
	Age(m)	11.6	12.7	11.6	¹⁺	10.7	11	10.9		11.2	11.2	11	¹⁺
	Age(SD)	2.8	2.4	2.7		3.3	3.3	3.3		3	3.2	3.1

ESP_V	N	69	5	74		40	35	75		109	40	149
	Age(m)	9.4	8.6	9.4	^{1-, 2-}	11.1	11.9	11.5		10	11.5	10.4
	Age(SD)	2.4	3.3	2.4		2.8	3	2.9		2.6	3.2	2.9

GER_E	N	32	4	36		23	26	49		55	30	85
	Age(m)	10.8	10.5	10.7		10.1	11.8	11		10.5	11.6	10.9
	Age(SD)	2.9	2.6	2.8		3.8	4.2	4		3.2	4	3.5

GER_G	N	76	6	82		54	56	110		130	62	192
	Age(m)	10.4	9.7	10.3	^1-	10.2	10.3	10.2		10.3	10.2	10.3
	Age(SD)	2.3	2.3	2.3		3.2	3.7	3.5		2.7	3.6	3

IRL_D	N	85	15	100		70	73	143		155	88	243
	Age(m)	11.4	10.5	11.2	²⁺	10.1	11	10.6		10.8	10.9	10.8
	Age(SD)	3.2	2.9	3.2		3.1	3.1	3.1		3.2	3.1	3.2

ISR_J	N	52	8	60		27	40	67		79	48	127
	Age(m)	10	8.3	9.8	^{1-, 3-}	10.9	10.3	10.5		10.3	9.9	10.2
	Age(SD)	2.7	1.2	2.6		3.4	3.3	3.3		2.9	3.2	3

ISR_P	N	120	13	133		109	87	196		229	100	329
	Age(m)	10.4	11	10.4	^1-	11.6	11.4	11.5		11	11.4	11.1	¹⁺
	Age(SD)	2.8	3.7	2.9		3.4	3.3	3.4		3.1	3.4	3.2

NLD_A	N	135	20	155		106	109	215		241	129	370
	Age(m)	11.2	10.7	11.1	^{2+, 3+}	10.4	11.1	10.8		10.8	11	10.9
	Age(SD)	2.7	2	2.6		3.4	3.9	3.6		3	3.6	3.2

NLD_G	N	135	30	165		116	114	230		251	144	395
	Age(m)	11.1	10.4	11	^2+,3+	10.9	10.5	10.7		11	10.5	10.8	¹⁺
	Age(SD)	2.7	3.5	2.8		3.2	3.5	3.3		2.9	3.5	3.1

SWI_Z	N	43	9	52		27	33	60		70	42	112
	Age(m)	9.8	9.8	9.8	^1-	10	9.3	9.6		9.9	9.4	9.7	^1-
	Age(SD)	1.7	2.3	1.8		3.9	2.7	3.2		2.7	2.6	2.6

All	N	938	130	1068		730	716	1446		1668	846	2514
	Age(m)	10.8	10.6	10.8		10.7	10.8	10.8		10.8	10.8	10.8
	Age(SD)	2.7	2.9	2.8		3.3	3.5	3.4		3	3.4	3.1

* Significant main effects of status, gender, and centre, and interaction effect of status × gender (see text)

° Significant main effect of centre, and interaction effect of status × centre (see text)

§ Significant age differences within each column between pairs with equal number and different sign (e.g. 3+ and 3-)