Table 2. Regression quasi-Poisson univariate and multivariate models of the effects of independent variables on the annual failure rate of dental implants.

Category		Univariate Quasi-Poisson			Multivariate Quasi-Poisson
		OR	CI 95%	p-value	OR	CI 95%	p-value
Study Age		1.07	[0.98–1.16]	0.085	1.12	[1.06–1.19]	0.002
Number of Implants		1.00	[0.99–1.00]	0.424
Impact Factor		0.90	[0.61–1.33]	0.549
Periodontal Status Report	No	1	–
	Yes	0.90	[0.33–2.45]	0.812
Prosthetic Design	ITS-FPD	1	–
	IS-FPD	0.56	[0.34–0.91]
	IS-SC	0.34	[0.15–0.77]	0.023
Quality Score	LRB	1	–
	RB	0.81	[0.47–1.41]	0.427
Statistical Advisor	No	1	–
	Yes	1.54	[0.95–2.50]	0.082
Funding Source	Non-Industry Associated	1	–		1
	Industry Associated	0.32	[0.17–0.60]		0.21	[0.12–0.38]
	Unknown	0.37	[0.21–0.63]	0.005	0.33	[0.21–0.51]	<0.001