Table 2.

Mean ± SD and median of different types of refraction and gender in different timelines

	Male			Female			P value
	Median	Mean	SD	Median	Mean	SD
Sphere
2019–2018	− 0.25	− 0.17	1.00	− 0.25	− 0.26	0.94	0.03†
2020–2019	− 0.25	− 0.34	0.99	− 0.45	− 0.39	0.91	0.16†
SE
2019–2018	− 0.19	− 0.19	1.02	− 0.25	− 0.28	0.97	0.02†
2020–2019	− 0.38	− 0.37	1.01	− 0.38	− 0.41	0.95	0.28†

*Mean ± standard deviation (SD) was presented except where noted otherwise

^†Statistical significance was tested using t tests