Table 3.

Meta-regression analysis of the effect of the factors on the ocular manifestations of the COVID-19 patients

Variables	Multivariable meta-regression
	Coefficient	P -value	[95% conf. Interval]
Quality of the included papers (quality $\ge$4 vs quality $<$ 4)	0.02	0.59	–0.07 – 0.11
The mean age of the patients ($\le$ 45 years vs $>$ 45 years	–0.11	0.29	–0.35 – 0.13
Clinical examination (standard ophthalmic exam vs non-standard ophthalmic exam	0.12	0.33	–0.17 – 0.42
Diagnostic method (PCR vs CT Scan and clinical signs)	–0.22	0.09	–0.50 – 0.05
The recruited sample size (sample size $>$ 500 vs sample size $\le$ 500)	–0.22	0.13	–0.52 – 0.09
conf., confidence