Table 1.
Mean Beck Depression Inventory (BDI) score, depressive symptom severity, and treatment for depression by year
| BDI Severity categories | Treatment | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| BDI total | Minimal (0–9) | Mild (10–18) | Moderate (19–29) | Severe (30–63) | Antidepressant | Counseling | Hospitalization | |||||
| Time | Total N | M (SD) | N (%) | N (%) | N (%) | N (%) | Total N | N (%) | Total N | N (%) | Total N | N (%) |
| Pre-surgery | 2248 | 9.7 (7.3) | 1303(58.0) | 674 (30.0) | 229 (10.2) | 42 (1.9) | 2257 | 701 (31.1) | 2211 | 317 (14.3) | 2248 | 126 (5.6) |
| 6-month | 1909 | 6.3 (5.9) | 1565 (82.0) | 263 (13.8) | 67 (3.5) | 14 (0.7) | 1855 | 475 (25.6) | 1841 | 217 (11.8) | 1862 | 19 (1.0) |
| Year 1 | 1846 | 5.5 (6.4) | 1539 (83.4) | 219 (11.9) | 61 (3.3) | 26 (1.4) | 1648 | 428 (26.0) | 1647 | 215 (13.1) | 1669 | 22 (1.3) |
| Year 2 | 1576 | 5.5 (7.0) | 1292 (82.0) | 193 (12.2) | 69 (4.4) | 22 (1.4) | 1566 | 419 (26.8) | 1562 | 201 (12.9) | 1584 | 29 (1.8) |
| Year 3 | 1520 | 6.1 (7.3) | 1193 (78.5) | 225 (14.8) | 78 (5.1) | 24 (1.6) | 1546 | 424 (27.4) | 1533 | 220 (14.4) | 1554 | 18 (1.2) |
| Year 4 | 1486 | 6.7 (7.9) | 1123 (75.6) | 227 (15.3) | 105 (7.1) | 31 (2.1) | 1572 | 437 (27.8) | 1563 | 236 (15.1) | 1585 | 21 (1.3) |
| Year 5 | 1523 | 6.7 (7.9) | 1151 (75.6) | 240 (15.8) | 99 (6.5) | 33 (2.2) | 1104 | 301 (27.3) | 1102 | 165 (15.0) | 1109 | 16 (1.4) |
| Year 7 | 1034 | 6.6 (7.4) | 775 (74.8) | 182 (17.6) | 57 (5.5) | 20 (1.9) | 2257 | 701 (31.1) | 2211 | 317 (14.3) | 2248 | 126 (5.6) |
Note. BDI=Beck Depression Inventory. Total N reflects the number of participants who responded to the assessment at each assessment.