Table 1.

Means and standard deviations (SD) for years 1, 2 and 3 Boston Naming Test (BNT) and home literacy environment (HLE)

Variable	Mean	SD	Minimum	Maximum	n
BNT year 1	28.04	6.99	8.00	46.00	614
BNT year 2	32.29	7.11	14.00	51.00	530
BNT year 3	37.38	6.68	13.00	52.00	413
HLE year 1	6.20	2.32	0.00	11.00	567
HLE year 2	6.78	2.34	0.00	11.00	513
HLE year 3	7.05	2.24	1.00	11.00	403

Note. The number of individuals using all available data from the year 1, 2 and 3 cohorts are referred to by n.