Table 2. Lesion and procedural characteristics.

Parameters	Stent positioning system (n=69)	Conventional technique group (n=70)	P value
Target vessel location
Left main ostial	21 (30.4%)	31 (44.3%)	0.09
Right coronary ostial	48 (69.6%)	39 (55.7%)	0.09
Reference vessel diameter (mm)	3.42±0.48	3.49±0.45	0.43
Stenosis (%)	81.29±13.21	84.56±11.66	0.12
Lesion type			0.54
A	8 (11.6%)	4 (5.7%)
B1	12 (17.4%)	13 (18.6%)
B2	6 (8.7%)	4 (5.7%)
C	43 (62.3%)	49 (70.0%)
TIMI flow
0	11 (15.9%)	12 (17.1%)
1	2 (2.9%)	1 (1.4%)	0.76
2	4 (5.8%)	7 (10.0%)
3	52 (75.4%)	50 (71.4%)
Number of stent overlap	34 (49.3%)	37 (52.9%)	0.67
Ostial stent diameter (mm)	3.41±0.45	3.46±0.40	0.51
Ostial stent length (mm)	24.59±7.21	24.33±0.82	0.84
Ischemic symptoms	4 (5.8%)	4 (5.7%)	0.63
Palpitation	1 (1.4%)	2 (2.9%)
Chest tightness	2 (2.9%)	2 (2.9%)
Chest pain	1 (1.4%)	0

Data are presented as n (%) or mean ± SD. Comparisons of qualitative indicators between groups were done by likelihood ratio chi-square test or Fisher’s exact probability test; comparisons of quantitative indicators between groups were done by student t-test. TIMI, thrombolysis in myocardial infarction.