Table 3 Descriptive statistics of PROMIS parent proxy domains (N = 521)
Domain | Tailored administration? | No. items | Min | Max | Mean | SD | Skewness | Correlation between Sum Score and IRT T-Score |
|---|---|---|---|---|---|---|---|---|
Fatigue Impact | No | 5 | 34.00 | 73.00 | 50.79 | 9.42 | −0.33 | 0.98 |
Strength Impact | No | 4 | 35.00 | 68.00 | 50.13 | 9.28 | 0.03 | 0.99 |
Negative Affect | No | 9 | 31.77 | 75.83 | 50.32 | 9.39 | −0.16 | 0.98 |
Sleep-Device Symptoms* | Yes | 4 | 4.00 | 18.00 | 8.77 | 3.68 | 0.30 | NA |
Cognitive Function | No | 9 | 22.00 | 63.00 | 50.30 | 9.41 | −0.07 | 0.95 |
Upper Extremity Function | No | 5 | 34.00 | 66.00 | 50.18 | 9.60 | −0.13 | 0.98 |
Positive Affect | No | 4 | 21.00 | 68.00 | 50.18 | 9.37 | −0.47 | 0.99 |
Mobility* | Yes | 13 | 13.00 | 65.00 | 32.47 | 13.76 | 0.50 | NA |
Total number of items across domains for tailored administration | ||||||||
 Ambulatory |  | 50 |  |  |  |  |  |  |
 Transitional |  | 51 |  |  |  |  |  |  |
 Non-ambulatory |  | 48 |  |  |  |  |  |  |