Table 1 Baseline characteristics of the study population, their comparison between the responsive and unresponsive patients to nitroglycerine, and the univariable logistic regression analysis
From: Intracoronary injection of nitroglycerine can prevent unnecessary percutaneous coronary intervention
Total, n = 360 | Responsive (n = 27) | Unresponsive (n = 333) | Odds ratio | 95 confidence interval | P-value | |
|---|---|---|---|---|---|---|
Age, year (mean ± SD) | 60.2 ± 11.6 | 60.8 ± 10.5 | 60.2 ± 11.7 | 0.99 | 0.96–1.03 | 0.796 |
Male sex, n (%) | 265 (73.6) | 18 (66.7) | 247 (74.2) | 1.43 | 0.62–3.31 | 0.397 |
Hypertension, n (%) | 176 (48.9) | 11 (40.7) | 165 (49.5) | 1.43 | 0.64–3.17 | 0.381 |
Diabetes mellitus, n (%) | 106 (29.4) | 5 (18.5) | 101 (30.3) | 1.92 | 0.71–5.20 | 0.202 |
Hyperlipidemia, n (%) | 81 (22.5) | 4 (14.8) | 77 (23.1) | 1.73 | 0.58–5.15 | 0.325 |
Smoking, n (%) | 117 (32.5) | 10 (37.0) | 107 (32.1) | 0.8 | 0.36–1.82 | 0.601 |
Previous cardiovascular disease, n (%) | 138 (38.3) | 6 (22.2) | 132 (39.6) | 2.3 | 0.90–5.85 | 0.081 |
Diagnosis at presentation, n (%) | ||||||
Stable angina | 128 (35.6) | 13 (48.1) | 115 (34.5) | – | – | 0.058 |
Unstable angina/NSTEMI | 83 (23.1) | 9 (33.3) | 74 (22.2) | 0.93 | 0.38–2.28 | 0.873 |
STEMI | 149 (41.4) | 5 (18.5) | 144 (43.2) | 3.26 | 1.13–9.40 | 0.029 |
The involved vessel, n (%) | ||||||
LM stenosis | 19 (5.3) | 3 (11.1) | 16 (4.8) | 0.4 | 0.11–1.48 | 0.172 |
LAD stenosis | 223 (61.9) | 10 (37.0) | 213 (64.0) | 3.02 | 1.34–6.80 | 0.006 |
LCX stenosis | 112 (31.1) | 4 (14.8) | 108 (32.4) | 2.76 | 0.93–8.17 | 0.067 |
RCA stenosis | 144 (40.0) | 11 (40.7) | 133 (39.9) | 0.97 | 0.43–2.15 | 0.935 |
Multivessel disease, n (%) | 159 (44.2) | 1 (3.7) | 158 (47.4) | 23.47 | 3.15–174.99 | 0.002 |