Video display terminal use and other risk factors for abnormal blinking in children: gender differences

BMC Ophthalmology

Table 4 The Cut-off Value, sensitivity, specificity, and AUC of factors for the different grouping conditions

Gender	Factor	Cut-Off Value	Sensitivity (%)	Specificity (%)	AUC	P Value
Male	VDTt^a	1.750	0.932	0.814	0.885	<0.001
	OPI^a	1.014	0.909	0.372	0.664	0.008
	AVG^b	58.500	0.816	0.980	0.962	<0.001
Female	VDTt^a	1.250	0.725	0.850	0.783	<0.001
	OPI^a	1.770	0.675	0.675	0.704	0.002
	AVG^c	53.500	1.000	0.829	0.972	<0.001

^aThe results are grouped according to a bound of 20 blinks per minute
^bThe results are grouped according to a daily bound value of 1.75 hours of VDT usage
^cThe results are grouped according to a daily bound value of 1.25 hours of VDT usage
Notes: P<0.05 denoted statistical significance
Abbreviations: VDTt video display terminal time, OPI ocular protection index, VG the average of tear film lipid layer thickness, AUC area under the curve

ISSN: 1471-2415