Table 1.

Descriptive statistics for the delayed recall and verbal fluency observed variables and for the covariates age, father, mother, and participant’s education.

Variables	N	Waves	M	Variance	Minimum	Maximum	Percentage with minimum (%)	Percentage with maximum (%)	Mdn
Delayed recall	2662	Wave 2	3.67	3.66	0	10	5.90	0.38	4.00
	2662	Wave 4	3.66	4.20	0	10	8.98	0.23	4.00
	2662	Wave 5	3.55	4.48	0	10	10.56	0.34	4.00
	2662	Wave 6	3.44	4.55	0	10	12.36	0.23	3.00
	2662	Wave 7	3.13	4.46	0	10	16.08	0.23	3.00
Verbal fluency	2662	Wave 2	19.97	49.86	0	74	0.04	0.04	19.00
	2662	Wave 4	18.84	45.54	2	93	0.08	0.04	18.00
	2662	Wave 5	19.06	52.34	0	100	0.04	0.04	18.00
	2662	Wave 6	18.69	50.57	0	88	0.04	0.04	18.00
	2662	Wave 7	18.22	60.53	0	100	0.41	0.08	18.00
Age	2662		69.23	29.02	61	90	0.60	0.04	68.00
Father's education	2600		0.48	0.44	0	2	61.62	9.65	0.00
Mother's education	2640		0.34	0.29	0	2	69.89	3.52	0.00
Participant's education	2643		0.84	0.56	0	2	37.31	20.92	1.00