Table 2.
Relationship between direction of head tremor and clinical characteristics in 51 ET cases
| mixed | no-no | yes-yes | chi-square | p-value | |
|---|---|---|---|---|---|
|
| |||||
| N | 28 | 14 | 9 | ||
|
| |||||
| Age category (years) | 15.45 | 0.004 | |||
| <60 | 0 (0.0) | 6 (42.9) | 1 (11.1) | ||
| 60–74 | 9 (32.1) | 3 (21.4) | 4 (44.4) | ||
| ≥75 | 19 (67.9) | 5 (35.7) | 4 (44.4) | ||
|
| |||||
| Female | 23 (82.1) | 8 (57.1) | 4 (44.4) | 5.68 | 0.058 |
|
| |||||
| Tremor duration (years)* | 18.52 | 0.018 | |||
| <20 | 3 (11.1) | 7 (58.3) | 0 (0.0) | ||
| 20–39 | 13 (48.1) | 1 (8.3) | 3 (37.5) | ||
| 40–59 | 6 (22.2) | 4 (33.3) | 3 (37.5) | ||
| ≥60 | 5 (18.5) | 0 (0.0) | 2 (25.0) | ||
|
| |||||
| Reported one or more 1st degree relative with ET | 7 (25.0) | 6 (42.9) | 4 (44.4) | 2.22 | 0.33 |
|
| |||||
| Prescribed tremor medications | 18 (64.2) | 9 (64.2) | 5 (55.6) | 1.63 | 0.80 |
|
| |||||
| Tremor in voice (examination) | 12 (42.9) | 2 (14.3) | 5 (55.6) | 5.20 | 0.07 |
|
| |||||
| Tremor continuity | 20.13 | <0.001 | |||
| Continuous | 18 (64.3) | 1 (7.1) | 1 (11.1) | ||
| Intermittent | 6 (21.4) | 4 (28.6) | 5 (55.5) | ||
| Rare | 4 (14.3) | 9 (64.3) | 3 (33.3) | ||
|
| |||||
| Total tremor score (0–36)**: | 9.88 | 0.04 | |||
| 0–12 | 2 (7.1) | 4 (30.8) | 3 (33.3) | ||
| 13–24 | 16 (57.6) | 8 (61.5) | 6 (66.7) | ||
| 25–36 | 10 (35.7) | 1 (7.7) | 0 (0.0) | ||
*
Data unavailable for 4 ET cases
**
Data unavailable for 1 ET case