Table 4.

Age and IQ test performance by APOE ε4 alleles across assessments at Years 7, 12, and 16.

Total Sample	Variable	APOEε4=0			APOEε4=1			APOEε4= 2
		N	Mean	SD	N	Mean	SD	N	Mean	SD
Year 7	Verbal IQ	865	106.31	14.32	296	105.72	14.65	15	107.40	10.44
	Performance IQ	866	110.78	12.54	296	108.68	13.62	15	110.53	10.33
	Full Scale IQ	865	109.24	12.99	296	107.77	13.50	15	109.60	7.87
	Age	871	7.42	0.37	296	7.45	0.36	15	7.38	0.40
Year 12	Verbal IQ	839	105.89	13.19	288	105.58	12.76	14	108.07	14.07
	Performance IQ	839	105.85	13.75	287	104.36	13.59	13	109.62	8.44
	Full Scale IQ	839	106.38	12.95	287	105.40	12.74	13	109.08	10.87
	Age	841	12.44	0.39	288	12.45	0.36	14	12.40	0.42
Year 16	Verbal IQ	873	103.70	12.58	288	102.94	11.58	14	103.43	10.91
	Performance IQ	873	104.25	12.44	288	103.22	11.88	14	105.86	14.20
	Full Scale IQ	873	104.17	11.75	288	103.20	10.63	14	104.71	10.31
	Age	873	16.36	0.44	289	16.36	0.43	14	16.55	0.41
Males	Variable	N	Mean	SD	N	Mean	SD	N	Mean	SD
Year 7	Verbal IQ	430	105.81	14.49	146	107.03	14.17	8	106.88	11.31
	Performance IQ	430	111.14	12.72	146	110.82	13.08	8	115.38	10.93
	Full Scale IQ	430	109.13	13.29	146	109.72	13.11	8	111.88	7.88
	Age	432	7.47	0.39	146	7.51	0.36	8	7.54	0.40
Year 12	Verbal IQ	407	106.61	13.36	142	107.55	13.41	7	114.57	11.31
	Performance IQ	407	104.89	13.80	142	106.12	13.49	7	111.71	6.32
	Full Scale IQ	407	106.29	12.84	142	107.56	13.33	7	114.71	7.95
	Age	409	12.48	0.40	142	12.51	0.38	7	12.58	0.45
Year 16	Verbal IQ	421	104.49	13.05	147	104.46	11.13	6	109.50	11.36
	Performance IQ	421	103.97	12.94	147	104.99	12.40	6	114.83	14.96
	Full Scale IQ	421	104.54	12.05	147	104.98	10.86	6	112.33	8.96
	Age	421	16.39	0.48	148	16.41	0.44	6	16.64	0.47
Females	Variable	N	Mean	SD	N	Mean	SD	N	Mean	SD
Year 7	Verbal IQ	435	106.81	14.14	150	104.44	15.04	7	108.00	10.21
	Performance IQ	436	110.42	12.37	150	106.60	13.86	7	105.00	6.53
	Full Scale IQ	435	109.34	12.70	150	105.87	13.64	7	107.00	7.57
	Age	439	7.37	0.33	150	7.39	0.35	7	7.19	0.35
Year 12	Verbal IQ	432	105.20	13.01	146	103.66	11.83	7	101.57	14.22
	Performance IQ	432	106.75	13.66	145	102.64	13.52	6	107.17	10.48
	Full Scale IQ	432	106.45	13.06	145	103.28	11.81	6	102.50	10.56
	Age	432	12.40	0.38	146	12.39	0.33	7	12.21	0.31
Year 16	Verbal IQ	452	102.96	12.10	141	101.36	11.87	8	98.88	8.58
	Performance IQ	452	104.51	11.96	141	101.38	11.07	8	99.13	9.67
	Full Scale IQ	452	103.82	11.46	141	101.34	10.10	8	99.00	7.27
	Age	452	16.32	0.40	141	16.31	0.40	8	16.47	0.39