Table 7.

Cox regression model of the four influencing factors

Influencing factors	B	SE	Wald	P	HR	HR 95% CI
Material	− 0.486	0.240	4.106	0.043	0.615	0.385–0.984
Location	0.184	0.244	0.565	0.452	1.201	0.745–1.939
Gender	0.487	0.238	4.192	0.041	1.627	1.021–2.592
Position
Molar region			5.098	0.078
Anterior region	− 0.08	0.476	0.028	0.867	0.923	0.363–2.348
Premolar region	− 0.98	0.435	5.09	0.024	0.375	0.160–0.879

Multivariate regression analysis with Cox regression was used to examine the influential factors, including gender, material, implant position and location. After multivariate regression analysis, the results showed that material, gender and tooth position were independent factors affecting survival time