Factors affecting complete clinical success – results of
logistic regression analysis
In univariate logistic regression analysis the factors that reduced the
probability of clinical success were as follows: all types of fibrous
tissue binding sites: decrease of 88.7% (OR=0.113; p<0.001),
fibrous tissue binding the lead to the SVC: decrease of 85.6%
(OR=0.144; p<0.001), to the RA: decrease of 83.1% (OR= 0.169;
p< 0.001), to the TV: decrease of 80.7% (OR= 0.153;
p<0.001), to the RV: decrease of 80.7% (OR= 0.193;
p<0.001), lead-to-lead binding sites: decrease of 83.2% (OR=
0.168; p< 0.001) and the presence of AMEL: decrease of 76.4%
(OR=0.236; p< 0.01), including the presence of fibrous tissue
encasing the lead: decrease of 63.7% (OR=0.363; p<0.05) and
lead thickening: decrease of 81.2% (OR=0.188; p<0.001).
Multivariate analysis showed that fibrous tissue binding the lead to the
TV (OR=0.307; p<0.05) was the strongest predictor of clinical
success. Lead-to-lead binding sites (OR= 0,378; p= 0,054) and lead
thickening (OR= 0.385; p=0.059) approached the borderline of
significance (Table 4).