Table 4.

Univariate analysis of Clouclip M2 eye behavior, eye environment, and screening myopia in students.

	Clouclip M2
	Myopia	Non-myopia	Χ 2	P
Average total time for near work per day
<180 min	19	13
≥180 min	143	37	6.072	0.014
Maximum time for single near work
<60 min	42	23
≥60 min	120	27	7.242	0.007
Average distance of near work
<30 cm	52	15
≥30 cm	110	35	0.078	0.780
Average total time for outdoor activities per day
<90 min	118	26
≥90 min	44	24	7.616	0.006
Average outdoor exposure times
<8 times	78	14
≥8 times	84	36	6.314	0.012
Daytime luminance
<200 lux	96	21
≥200 lux	66	29	4.602	0.032
Nighttime luminance
<125 lux	104	24
≥125 lux	58	26	4.190	0.041

P value indicates whether there is statistical difference in the behavior of each eye measured by Clouclip M2 between the myopia group and the non-myopia group.