Table 1. Demographic and Tinnitus Characteristics of TRTT Study Participants by Treatment Group.
| Characteristic | SoC (n = 49) | Partial TRT (n = 51) | TRT (n = 51) | Total (N = 151) |
|---|---|---|---|---|
| Age, mean (SD), y | 49.9 (10.0) | 50.9 (11.2) | 51.1 (12.6) | 50.6 (11.3) |
| Sex, No. (%) | ||||
| Male | 36 (73.5) | 37 (72.5) | 34 (66.7) | 107 (70.9) |
| Female | 13 (26.5) | 14 (27.5) | 17 (33.3) | 44 (29.1) |
| Race, No. (%) | ||||
| White | 35 (71.4) | 39 (76.5) | 36 (70.6) | 110 (72.9) |
| Black or African-American | 7 (14.3) | 6 (11.8) | 5 (9.8) | 18 (11.9) |
| Asian | 2 (4.1) | 4 (7.8) | 3 (5.9) | 9 (6.0) |
| Native Hawaiian or Pacific Islander | 0 | 1 (2.0) | 1 (2.0) | 2 (1.3) |
| Other | 3 (6.1) | 0 | 4 (7.8) | 7 (4.6) |
| Unknown or not reported | 2 (4.1) | 1 (2.0) | 2 (3.9) | 5 (3.3) |
| Ethnicity, No. (%) | ||||
| Hispanic or Latino | 5 (10.2) | 5 (9.8) | 7 (13.7) | 17 (11.3) |
| Marital status, No. (%) | ||||
| Married or living with partner | 41 (83.7) | 41 (80.4) | 39 (76.5) | 121 (80.1) |
| Widowed | 1 (2.0) | 0 | 0 | 1 (0.7) |
| Divorced or separated | 4 (8.2) | 4 (7.8) | 7 (13.7) | 15 (9.9) |
| Single or never married | 3 (6.1) | 6 (11.8) | 4 (7.8) | 13 (8.6) |
| Other or unknown | 0 | 0 | 1 (2.0) | 1 (0.7) |
| Tinnitus duration, mean (SD), y | 13.0 (11.4) | 11.7 (11.1) | 10.9 (8.9) | 11.8 (10.5) |
| Time during which tinnitus has been a significant problem, No. (%) | ||||
| <1 y | 3 (6.1) | 3 (5.9) | 3 (5.9) | 9 (6.0) |
| 1 to <2 y | 3 (6.1) | 8 (15.7) | 9 (17.7) | 20 (13.3) |
| 2 to <5 y | 20 (40.8) | 17 (33.3) | 15 (29.4) | 52 (34.4) |
| ≥5 y | 22 (44.9) | 22 (43.1) | 24 (47.1) | 68 (45.0) |
| Unknown | 1 (2.0) | 1 (2.0) | 0 | 2 (1.3) |
| Onset of tinnitus, No. (%) | ||||
| Sudden | 12 (24.5) | 17 (33.3) | 13 (25.5) | 42 (27.8) |
| Gradual | 32 (65.3) | 28 (54.9) | 30 (58.8) | 90 (59.6) |
| Unknown | 5 (10.2) | 6 (11.8) | 8 (15.7) | 19 (12.6) |
| Type of sound heard, No. (%) | ||||
| Tonal | 47 (95.9) | 47 (92.2) | 47 (92.2) | 141 (93.4) |
| Low-frequency noise | 1 (2.0) | 2 (3.9) | 4 (7.8) | 7 (4.6) |
| High-frequency noise | 0 | 1 (2.0) | 0 | 1 (0.7) |
| Crickets | 0 | 1 (2.0) | 0 | 1 (0.7) |
| Missing data | 1 (2.0) | 0 | 0 | 1 (0.7) |
| Accidentally exposed to sudden intense noise, No. (%) | 31 (63.3) | 26 (51.0) | 23 (45.1) | 80 (53.0) |
| Exposure to environmental hazards or other factors associated with tinnitus, No. (%) | 14 (28.6) | 15 (29.4) | 14 (27.5) | 43 (28.5) |
| Location of tinnitus, No. (%) | ||||
| 1 Ear | 8 (16.3) | 6 (11.8) | 10 (19.6) | 24 (15.9) |
| Both ears | 16 (32.7) | 23 (45.1) | 23 (45.1) | 62 (41.1) |
| In the head only | 11 (22.4) | 12 (23.5) | 6 (11.8) | 29 (19.2) |
| ≥1 Ear and in the head | 14 (28.6) | 10 (19.6) | 12 (21.6) | 36 (23.8) |
| Frequency match, most troublesome tinnitus, median (IQR), kHz | ||||
| Left ear (n = 81) | 8 (4.9-11.8) | 8 (6.0-9.3) | 8 (3.6-8.0) | 8 (4.9-9.3) |
| Right ear (n = 84) | 8 (6.0-12.0) | 8 (4.0-9.3) | 6 (6.0-8.0) | 7 (6.0-9.3) |
| Loudness match, most troublesome tinnitus, median (IQR), dB HL | ||||
| Left ear (n = 81) | 38 (28-44) | 40 (27-57) | 46 (34-60) | 40 (28-56) |
| Right ear (n = 84) | 35 (28-47) | 38 (26-49) | 44 (22-61) | 39 (26-49) |
| Loudness discomfort level at tinnitus pitch match frequency, median (IQR), dB HL | ||||
| Left ear | 95 (89-103) | 93 (86-100) | 95 (90-105) | 95 (88-105) |
| Right ear | 96 (90-105) | 95 (85-100) | 92 (87-105) | 95 (87-105) |
| TRT category | ||||
| 0 | 9 (18.4) | 11 (21.6) | 12 (23.5) | 32 (21.1) |
| I | 15 (30.5) | 12 (23.5) | 10 (19.6) | 37 (24.5) |
| II | 5 (10.2) | 3 (5.9) | 8 (15.7) | 16 (10.6) |
| III | 15 (30.6) | 17 (33.3) | 17 (33.3) | 49 (32.5) |
| IV | 4 (8.2) | 8 (15.7) | 4 (7.8) | 16 (10.6) |
| Missing | 1 (2.0) | 0 | 0 | 1 (0.7) |
Abbreviations: HL, hearing level; IQR, interquartile range; SoC, standard of care; TRT, tinnitus retraining therapy; TRTT, Tinnitus Retraining Therapy Trial.