TABLE 3.

Demographic characteristics of SPAN subjects

Characteristics	N	Percent
Gender
Female	263	66
Male	133	34
Race
White	316	80
Black	42	11
Asian	30	8
Hispanic	2	1
Other or unspecified	6	2
Education
Less than high school	0	0
High school education or GED	4	1
Some college	70	18
College degree	137	35
Some graduate education	185	47
Family history
Two myopic parents	134	36
One myopic parent	159	42
No myopic parents	83	22
At least one myopic sibling	227	60
Age began wearing spectacles	13.8 ± 5.5
Ever worn contact lenses	305	77
Age began wearing contact lenses	18.1 ± 5.6
Currently wearing contact lenses
No	163	41
Soft	216	55
Wearing time	12.2 ± 5.6	82>7 hours/day
Rigid gas permeable	17	4
Wearing time	11.1 ± 6.5	76>7 hours/day
Correction not worn to read (n = 389)	68	17