Table 3.

Mean values of spherical equivalent refractive error by parental history of myopia and types of refractive error in male and female students

Characteristics	Male					Female
	n	SER Mean (D)	SD	95% CI		n	SER Mean (D)	SD	95% CI
Total	162	−0.82	1.90	−1.11	−0.52	176	−1.44	2.31	−1.79	−1.10
Parental history
None of the parents	130	−0.62	1.64	−0.90	−0.33	135	−1.13	2.22	−1.51	−0.76
One of the parents	27	−1.30	2.16	−2.15	−0.44	34	−2.30	2.31	−3.10	−1.49
Both parents	5	−3.48	4.10	−8.57	1.62	7	−3.27	2.41	−5.50	−1.03
Refractive errors
Myopes	69	−2.40	1.63	−2.79	−2.01	93	−2.85	2.26	−3.32	−2.39
Emmetropes	79	0.00	0.37	−0.08	0.09	75	−0.11	0.31	−0.18	−0.04
Hyperopes	14	2.32	1.41	1.51	3.14	8	2.48	1.44	1.28	3.68

Abbreviation: SER, spherical equivalent of refraction.