Table 2 Characteristics of angina episodes at basal evaluation and at follow‐up evaluation in patients treated with spinal cord stimulation and control patients.
| Basal evaluation | p Value | Follow‐up | p Value | |||
|---|---|---|---|---|---|---|
| SCS, n (%) | Controls, n (%) | SCS, n (%) | Controls, n (%) | |||
| Frequency of angina episodes | ||||||
| <1/week | 0 (0) | 0 (0) | 6 (31.6) | 1 (11.1) | ||
| 2–3/week | 1 (5.3) | 1 (11.1) | 6 (31.6) | 0 (0) | ||
| 4–6/week | 5 (26.3) | 4 (44.4) | 0.105 | 7 (36.8) | 4 (44.4) | 0.005 |
| 1–3/day | 7 (36.8) | 3 (33.3) | 0 (0) | 4 (44.4) | ||
| ⩾4/day | 6 (31.6) | 1 (11.1) | 0 (0) | 0 (0) | ||
| Duration of angina episodes | ||||||
| <5 min | 1 (5.3) | 0 (0) | 8 (42.1) | 2 (22.2) | ||
| 5–9 min | 5 (26.3) | 4 (44.4) | 0.498 | 9 (47.4) | 2 (22.2) | 0.095 |
| 10–19 min | 5 (26.3) | 2 (22.2) | 2 (10.5) | 3 (33.3) | ||
| ⩾20 min | 8 (42.1) | 3 (33.3) | 0 (0) | 2 (22.2) | ||
| Sublingual nitrates use | ||||||
| <1/week | 1 (5.3) | 3 (33.3) | 14 (73.7) | 3 (33.3) | ||
| 2–3/week | 6 (31.6) | 0 (0) | 5 (26.3) | 2 (22.2) | ||
| 4–6/week | 3 (15.8) | 4 (44.4) | 0.263 | 0 (0) | 2 (22.2) | 0.028 |
| 1–3/day | 7 (36.8) | 1 (11.1) | 0 (0) | 2 (22.2) | ||
| ⩾4/day | 2 (10.5) | 1 (11.1) | 0 (0) | 0 (0) | ||
| Angina episodes trigger | ||||||
| Exercise | 16 (84.2) | 7 (77.8) | 0.678 | 17 (89.5) | 8 (88.9) | 0.963 |
| Stress | 6 (31.6) | 3 (33.3) | 0.926 | 4 (21.1) | 2 (22.2) | 0.944 |
| Rest | 14 (73.7) | 8 (88.9) | 0.360 | 4 (21.1) | 9 (100) | <0.001 |
SCS, spinal cord stimulation.
Values are represented as mean (SD).