Table 2.

Relation between baseline M, baseline astigmatism, and progression towards myopia (M slope, D/year).

Baseline M	Baseline Astigmatism	All subjects in reduced sample			Never or rarely wore spectacles
		Mean	SD	N	Mean	SD	N
Myopic (M </= −0.75)	< 1.00 D	−0.04	0.23	8	−0.01	0.23	6
	1 to < 3 D	−0.13	0.20	13	−0.13	0.11	8
	3 D or more	−0.12	0.49	15	−0.04	0.49	9
	Total	−0.11*	0.35	36	−0.16	0.32	23
NHM (M > −0.75 and < +2.00)	< 1.00 D	−0.15	0.14	336	−0.14	0.12	319
	1 to < 3 D	−0.15	0.15	194	−0.14	0.15	137
	3 D or more	−0.16	0.22	59	−0.15	0.23	32
	Total	−0.15*	0.16	589	−0.14	0.14	488
Hyperopic (M >/= +2.00)	< 1.00 D	−0.20	0.14	31	−0.21	0.13	29
	1 to < 3 D	−0.22	0.17	87	−0.21	0.17	74
	3 D or more	−0.21	0.19	34	−0.22	0.21	17
	Total	−0.21*	0.17	152	−0.21	0.17	120
All	< 1.00 D	−0.15	0.15	375	−0.14	0.13	354
	1 to < 3 D	−0.17	0.16	294	−0.16	0.16	219
	3 D or more	−0.17	0.27	108	−0.15	0.28	58
	Total	−0.16	0.17	777	−0.15	0.16	631

^*Statistically significant difference between slopes for myopes, NHM, and hyperopes (p < 0.004).