TABLE 2.
Visit-Level Characteristics of the Samplea
| Factor | Present | Absent |
|---|---|---|
| Contact, left | ||
| 0 | 256 (61.2) | 162 (38.8) |
| 1 | 274 (65.6) | 144 (34.4) |
| 2 | 134 (32.1) | 284 (67.9) |
| 3 | 185 (44.3) | 233 (55.7) |
| Contact, right | ||
| 0 | 242 (58.0) | 175 (42.0) |
| 1 | 298 (71.5) | 119 (28.5) |
| 2 | 69 (16.5) | 348 (83.5) |
| 3 | 189 (45.3) | 228 (54.7) |
| Monopolar stimulation | ||
| Left | 104 (24.9) | 314 (75.1) |
| Right | 82 (19.7) | 335 (80.3) |
| Frequency, 130 Hz | ||
| Left | 90 (21.5) | 328 (78.5) |
| Right | 76 (18.2) | 341 (81.8) |
| Acute mood change at visit | 19 (4.4) | 409 (95.6) |
| Acute energy change at visit | 13 (3) | 415 (97) |
| Settings constant .4 weeks | 299 (69.9) | 129 (30.1) |
| Mean age at visit (years) | 44.45 (12.83) | |
| Mean pulse width (msec) | ||
| Left | 135.9 (53.9) | |
| Right | 134.8 (53.34) | |
| Mean MADRS slope per day | 0.03 (0.77) |
a
Data are presented as N (%) or the mean (standard deviation). Not all rows sum to the total visit count of 428, because some patients were occasionally unilaterally implanted (e.g., one stimulator was removed because of infection). MADRS, Montgomery-Åsberg Depression Rating Scale.