Table 4.

Percent of children in each ethnic/racial group who developed new cases of myopia, as a function of two different myopia definitions and their study follow-up.

		Entering non-myopes				Age at study entry (years)		Age at study exit (years)		Years of Follow-up
		Remained non- myopic		New case of myopia		Age at study entry (years)		Age at study exit (years)		Years of Follow-up
		N	%	N	%	Mean	SD	Mean	SD	Mean	SD
Definition of myopia	Ethnicity	361	78.99	96	21.01	9.35	1.68	13.39	1.73	4.04	2.05
Spherical equivalent −0.50 D or more myopia	Native American	361	78.99	96	21.01	9.35	1.68	13.39	1.73	4.04	2.05
	Asian	369	64.62	202	35.38	8.06	1.98	11.59	2.22	3.53	2.15
	African American	548	77.95	155	22.05	9.17	2.66	13.34	1.67	4.17	2.39
	Hispanic	655	70.35	276	29.65	8.76	2.24	12.70	2.04	3.94	2.30
	White	1321	83.19	267	16.81	8.05	2.15	12.38	1.91	4.33	2.21
	Other	29	74.36	10	25.64	8.33	2.30	12.16	2.09	3.83	2.48
Both meridians −0.75 D or more myopia	Native American	449	85.52	76	14.48	9.45	1.77	13.46	1.68	4.01	2.08
	Asian	449	72.65	169	27.35	8.16	2.06	11.60	2.24	3.44	2.16
	African American	631	86.08	102	13.92	9.21	2.67	13.36	1.67	4.15	2.39
	Hispanic	788	78.56	215	21.44	8.83	2.28	12.74	2.03	3.91	2.30
	White	1453	88.98	180	11.02	8.11	2.18	12.41	1.89	4.30	2.21
	Other	36	83.72	7	16.28	8.50	2.38	12.20	2.05	3.70	2.44