Table 3.

Preselection of variables in univariate model as a previous step for the construction of the multivariate model. Variables with p < 0.10 and/or odds ratio ≥ 1.2 were kept in the model for the subsequent multivariate statistical analysis.

Variables	Odds ratio (95% CI)	Beta coefficient	P
Length	3.07 (1.79–5.26)	1.12	< 0.001
Stump	3.9 (2.35–6.76)	1.38	< 0.001
Tortuosity	4.2 (2.42–7.25)	1.43	<0.001
CN	2.4 (1.31–4.41)	0.88	0.004
Calcification	1.4 (0.82–2.33)	0.34	0.19
Sex	1.95 (0.84–4.5)	0.67	0.12
Previous MI	1.25 (0.75–2.07)	0.22	0.39
Ostial location	1.22 (0.53–2.83)	0.20	0.64
Previous attempt	1.34 (0.55–3.30)	0.29	0.52
Visibility	1.74 (0.73–4.18)	0.56	0.21
Diameter < 2.5 mm	1.25 (0.72–2.16)	0.22	0.43
Age	0.99 (0.97–1.01)	−0.005	0.65
CABG	1.15 (0.48–2.80)	0.14	0.75
MD	1.06 (0.62–1.8)	0.057	0.83
Artery	1.07 (0.85–1.36)	0.071	0.56

CABG — coronary artery bypass graft; CI — confidence interval; CN — case number; MD — multivessel disease; MI — myocardial infarction