Table 2.
SCOPA-AUT item level Rasch model location and fit statistics (complete cases only, n = 404) a
| Domains and items b | Location (SE) c | Fit Residual d | Chi-square | P-value |
|---|---|---|---|---|
| Gastrointestinal | ||||
| 1. Swallowing/choking | 0.554 (0.085) | -0.500 | 1.153 | 0.949 |
| 2. Sialorrhea | -0.377 (0.065) | 0.067 | 6.156 | 0.291 |
| 3. Dysphagia | 0.702 (0.093) | -0.990 | 5.118 | 0.402 |
| 4. Early abdominal fullness | 0.056 (0.072) | 0.113 | 4.329 | 0.503 |
| 5. Constipation | 0.152 (0.072) | -1.202 | 4.928 | 0.425 |
| 6. Straining for defecation | -0.476 (0.065) | -1.320 | 14.363 | 0.013 e |
| 7. Faecal incontinence | 0.841 (0.122) | 0.587 | 4.08 | 0.538 |
| Urinary | ||||
| 8. Urinary urgency | -0.378 (0.066) | -2.179 | 7.501 | 0.186 |
| 9. Urinary incontinence | -0.241 (0.067) | -2.519 | 10.466 | 0.063 |
| 10. Incomplete emptying | 0.104 (0.075) | -0.958 | 4.95 | 0.422 |
| 11. Weak stream of urine | -0.219 (0.068) | -0.342 | 1.955 | 0.855 |
| 12. Frequency | -0.557 (0.069) | -0.710 | 5.325 | 0.377 |
| 13. Nocturia | -1.533 (0.058) | 1.777 | 9.407 | 0.094 |
| Cardiovascular | ||||
| 14. Lightheaded (standing up) | 0.245 (0.079) | -0.563 | 2.177 | 0.824 |
| 15. Lightheaded (standing some time) | 0.898 (0.091) | -0.650 | 3.238 | 0.663 |
| 16. Syncope | 1.432 (0.201) | -0.991 | 5.756 | 0.331 |
| Thermoregulatory | ||||
| 17. Hyperhidrosis during the day | 0.159 (0.070) | -0.683 | 7.966 | 0.158 |
| 18. Hyperhidrosis during the night | 0.150 (0.072) | 0.094 | 2.691 | 0.747 |
| 20. Cold intolerance | -0.021(0.067) | 0.825 | 8.94 | 0.111 |
| 21. Heat intolerance | 0.202 (0.074) | 0.389 | 7.386 | 0.193 |
| Pupillomotor | ||||
| 19. Oversensitive to bright light | -0.051 (0.070) | 0.194 | 13.875 | 0.016 e |
| Sexual | ||||
| 22. Sexual arousal problems f | -1.020 (0.068) | 3.519 | 15.892 | 0.007 e |
| 23. Orgasmic problems g | -0.622 (0.073) | -0.236 | 4.654 | 0.459 |
a Excluding people (n = 2) with extreme scores (i.e., those scoring 0 and 69)
b Items are presented by domain but were analyzed as a 23-item unidimensional scale
c Item locations are expressed in logit values and represent the mean of each item’s response category threshold locations. Negative locations represent less autonomic dysfunction and positive locations represent more autonomic dysfunction
d Standardized fit residuals represent discrepancies between observed and model-expected responses; should range between ± 2.5
e Not significant following Bonferroni correction
f Original items 22 (males; “erection problem”) and 24 (females; “vaginal problem”)
g Original items 23 (males; “ejaculation problems”) and 25 (females; “problems with orgasm