Methodological quality and reporting quality of COVID-19 living systematic review: a cross-sectional study

Table 2 Linear regression results of PRISMA statement and AMSTAR-2

Category	Number of "yes" in PRISMA/AMSTAR-2 rating	Univariate analysis	Multivariate analysis
Category	Number of "yes" in PRISMA/AMSTAR-2 rating	Coefficient (95% CI)	Coefficient (95% CI)	Adjusted R²	VIF
IF	Number of "yes" in PRISMA	-0.050,0.135
IF	AMSTAR-2 rating	-0.047,0.005
Number of authors	Number of "yes" in PRISMA	-0.057,0.118
Number of authors	AMSTAR-2 rating	-0.035,0.015
Number of institutions	Number of "yes" in PRISMA	-0.076,0.205
Number of institutions	AMSTAR-2 rating	-0.038,0.043
Number of included studies	Number of "yes" in PRISMA	-0.018,0.000	-0.019,-0.001	0.142^a	1.013
Number of included studies	AMSTAR-2 rating	-0.006,0.000	-0.006,-0.001	0.192^b	1.001
International collaborations	Number of "yes" in PRISMA	-0.141,4.031
International collaborations	AMSTAR-2 rating	-0.447,0.783
Funding	Number of "yes" in PRISMA	0.710,5.842	1.105,6.095	0.142 ^a	1.013
Funding	AMSTAR-2	-0.272,1.259
Registration	Number of "yes" in PRISMA	-2.395,2.997
Registration	AMSTAR-2 rating	0.386,1.832	0.448,1.832	0.192 ^b	1.001
PRISMA statement	Number of "yes" in PRISMA	-0.857,4.166
PRISMA statement	AMSTAR-2 rating	-0.843,0.620

CI Confidence interval, VIF Variance inflation factor
Bolded parts indicate that they are statistically different
^a Number of included studies" and "Funding" explained for 14.2% of the variation in "Number of ' yes' in PRISMA"
^b Number of included studies" and " Registration" explained for 19.2% of the variation in "AMSTAR-2 rating"

ISSN: 1471-2288