Table 1
The 14 items of TETRAS PRO.
| Instructions: For each question, circle or mark the answer that best describes your typical condition during the past week. A family member or friend can circle your answers if you cannot do this yourself. However, we want you to answer each question without discussing the answers with other people. |
| 1. Is your voice shaky or tremulous? |
| 2. Does your head shake? |
| 3. Does tremor affect your ability to eat soup or other liquids with a regular soup spoon? |
| 4. Does tremor affect your ability to drink liquids from a regular 8-ounce (250 ml) glass or cup? |
| 5. Does tremor interfere with your hygiene or personal care (bathing, shaving, brushing teeth, using makeup)? |
| 6. Does tremor interfere with your ability to dress yourself? This includes putting on jewelry, tying shoelaces, zipping zippers, and managing small buttons. |
| 7. Does tremor affect your ability to pour liquids from a carton, bottle or pitcher? |
| 8. Does tremor affect your ability to pass food or drink to someone at your dinner table? |
| 9. Does tremor limit your ability to use a keypad on a phone, lock or computer? |
| 10. Does tremor affect your ability to write? |
| 11. Does tremor affect your job performance? This would include being a homemaker. If you are retired, consider how your current tremor would have affected your previous job. |
| 12. Do you notice tremor in your legs? |
| 13. Think about how tremor affects your daily activities. In the space below, please write the activity that is most important to you. Activity _______________________________. How much does your tremor interfere with this activity? |
| 14. Has tremor affected your social activities? |
Figure 1
Linear regression of TETRAS PRO with TETRAS ADL, TETRAS Performance, and QUEST. A linear regression of TETRAS ADL vs TETRAS Performance is shown for comparison. The 95% confidence limits (maroon) and 95% prediction limits (orange) are shown. The maximum possible scores of TETRAS PRO, TETRAS ADL, AND TETRAS Performance are 56, 48, and 64.
Table 2
Statistical relationship of TETRAS PRO with HADS-D, ECQ-ISE and TETRAS Performance.
| LEAST SQUARES MULTIPLE REGRESSION | |||||||
|---|---|---|---|---|---|---|---|
| Sample size | 67 | ||||||
| Coefficient of determination R2 | 0.6715 | ||||||
| R2-adjusted | 0.6559 | ||||||
| Multiple correlation coefficient | 0.8195 | ||||||
| Residual standard deviation | 5.4008 | ||||||
| REGRESSION EQUATION | |||||||
| Predictor variables | Coefficient | Std. Error | t | P | rpartial | rsemipartial | VIF |
| (Constant) | –3.6996 | ||||||
| TETRAS-P | 0.8267 | 0.09829 | 8.411 | <0.0001 | 0.7273 | 0.6073 | 1.030 |
| HADS-D | 1.1361 | 0.2134 | 5.324 | <0.0001 | 0.5571 | 0.3844 | 1.045 |
| ECQ-ISE | 0.8436 | 0.3458 | 2.439 | 0.0175 | 0.2938 | 0.1761 | 1.068 |
| ANALYSIS OF VARIANCE | |||||||
| Source | DF | Sum of Squares | Mean Square | ||||
| Regression | 3 | 3756.8544 | 1252.2848 | ||||
| Residual | 63 | 1837.6531 | 29.1691 | ||||
| F-ratio | 42.9319 | ||||||
| Significance level | P < 0.0001 | ||||||
| RESIDUALS | |||||||
| Shapiro-Wilk test for Normal distribution | W = 0.9874 accept Normality (P = 0.7367) | ||||||
[i] TETRAS PRO = β0 + β1·TETRAS-P + β2·HADS-D + β3·ECQ-ISE.
Table 3
Statistical relationship of TETRAS ADL with HADS-D, ECQ-ISE and TETRAS Performance.
| LEAST SQUARES MULTIPLE REGRESSION | |||||||
|---|---|---|---|---|---|---|---|
| Method | Enter | ||||||
| Sample size | 67 | ||||||
| Coefficient of determination R2 | 0.6263 | ||||||
| R2-adjusted | 0.6085 | ||||||
| Multiple correlation coefficient | 0.7914 | ||||||
| Residual standard deviation | 4.4741 | ||||||
| REGRESSION EQUATION | |||||||
| Independent variables | Coefficient | Std. Error | t | P | rpartial | rsemipartial | VIF |
| (Constant) | 3.9741 | ||||||
| TETRAS-P | 0.7009 | 0.08142 | 8.608 | <0.0001 | 0.7352 | 0.6630 | 1.030 |
| HADS-D | 0.6380 | 0.1768 | 3.609 | 0.0006 | 0.4140 | 0.2780 | 1.045 |
| ECQ-ISE | 0.4800 | 0.2865 | 1.676 | 0.0988 | 0.2066 | 0.1291 | 1.068 |
| ANALYSIS OF VARIANCE | |||||||
| Source | DF | Sum of Squares | Mean Square | ||||
| Regression | 3 | 2113.3264 | 704.4421 | ||||
| Residual | 63 | 1261.0915 | 20.0173 | ||||
| F-ratio | 35.1916 | ||||||
| Significance level | P < 0.0001 | ||||||
| RESIDUALS | |||||||
| Shapiro-Wilk test for Normal distribution | W = 0.9912 accept Normality (P = 0.9198) | ||||||
[i] TETRAS ADL = β0 + β1·TETRAS-P + β2·HADS-D + β3·ECQ-ISE.