Table 3.

Age distribution of children at testing (N = 1,142).

	Age in Months
Age (Years)	N	Mean (SD)	Range
3	215	45.3 (1.80)	41.0 – 47.9
4 Young§	311	51.5 (2.05)	48.0 – 57.0
4 Old	297	57.0 (1.90)	52.0 – 59.9
5*	319	63.1 (2.14)	60.0 – 68.0

^§4 years old at screening, but tested with screening cards for 3-year-olds.

^*5 years old at screening, but tested with screening cards for 4-year-olds.