Table 3.
Clinical characteristic of the single-vessel SCAD group and two- or three-vessel SCAD group
| Single-vessel(n = 36) | Two/three-vessel(n = 27) | P value | |
|---|---|---|---|
| Age (year) | 61.17 ± 5.44 | 62.78 ± 6.87 | 0.303 |
| Male sex (n, %) | 18/36 (50%) | 18/27 (66.7%) | 0.186 |
| Smoker (n, %) | 9/36 (25%) | 14/27 (51.9%) | 0.028 |
| BMI (kg/m2) | 24.78 ± 3.64 | 23.88 ± 2.92 | 0.293 |
| Hypertension (n, %) | 25/36 (69.4%) | 22/27 (81.5%) | 0.277 |
| DM (n, %) | 1/36 (2.8%) | 5/27 (18.5%) | 0.094 |
| Dyslipidaemia (n, %) | 30/36 (83.3%) | 24/27 (88.9%) | 0.795 |
| Cr (μM) | 70.88 ± 16.44 | 72.49 ± 11.43 | 0.650 |
| CHOL (mM) | 4.52 ± 0.94 | 4.70 ± 1.49 | 0.906 |
| TG (mM) | 1.58 ± 0.93 | 2.19 ± 1.68 | 0.089 |
| LDL-c (mM) | 2.83 ± 0.82 | 2.91 ± 1.35 | 0.546 |
| HDL-c (mM) | 1.05 ± 0.27 | 1.02 ± 0.23 | 0.597 |
| Ejection fraction (%) | 60.53 ± 5.42 | 62.07 ± 6.53 | 0.275 |
| Gensini score | 9.07 ± 5.07 | 32.15 ± 24.66 | 0.000 |
| Heart rate before Ex (bpm) | 79.5 ± 9.93 | 86 ± 13.88 | 0.034 |
| Peak heart rate (bpm) | 138 ± 5.79 | 137.48 ± 7.14 | 0.751 |
| HRR1 (bpm) | 25.11 ± 7.49 | 23 ± 8.97 | 0.313 |
| HRR1 ≤24 bpm (n, %) | 18/36 (50.0%) | 19/27 (70.4%) | 0.104 |
| HRR2 (bpm) | 44.53 ± 9.78 | 38.96 ± 11.79 | 0.045 |
| HRR2 ≤42 bpm (n, %) | 14/36 (38.9%) | 20/27 (74.1%) | 0.006 |
| HRR3 (bpm) | 49.31 ± 9.88 | 43.93 ± 11.22 | 0.019 |
| HRR4 (bpm) | 51.56 ± 9.74 | 46.82 ± 10.51 | 0.069 |
| HRR5 (bpm) | 54.11 ± 10.10 | 47.37 ± 11.05 | 0.011 |
| SDNN (ms) | 117.86 ± 26.97 | 112.52 ± 25.84 | 0.431 |
| SDANN (ms) | 107.28 ± 27.03 | 101.63 ± 26.94 | 0.414 |
| RMSSD (ms) | 23.17 ± 7.26 | 20.70 ± 3.47 | 0.081 |
| pNN50 (%) | 4.12 ± 4.03 | 2.57 ± 1.62 | 0.457 |
| VLF (ms) | 24.26 ± 5.90 | 24.65 ± 5.83 | 0.453 |
| LF (ms) | 13.61 ± 4.32 | 13.80 ± 3.69 | 0.857 |
| HF (ms) | 9.25 ± 2.85 | 8.51 ± 1.98 | 0.248 |
| Beta-blocker use (n, %) | 21/36 (58.3%) | 16/27 (59.2%) | 0.941 |
Values are expressed as n (%) or mean ± SD. Abbreviations: SCAD, stable coronary artery disease; BMI, body mass index; DM, diabetes mellitus; Cr, creatinine; CHOL, cholesterol; TG, triglycerides; LDL-c, low-density lipoprotein cholesterol; HDL-c, high-density lipoprotein cholesterol; Ex, treadmill exercise; HRR, heart rate recovery; HRRn, heart rate recovery at n minutes post-exercise; SDNN, standard deviation of NN intervals; SDANN, standard deviation of all 5-minute mean NN intervals; RMSSD, root mean square of successive differences; pNN50, the proportion derived by dividing the number of interval differences of successive NN intervals greater than 50 ms by the total number of NN intervals; VLF, very-low-frequency power; LF, low-frequency power; HF, high-frequency power.