Research Article
Independent Validation of the SEND-PD and Correlation with the MDS-UPDRS Part IA
Table 2
Clinimetric properties of SEND-PD subscales.
| | | SEND-PD subscales | | | Psychotic symptoms | Mood/apathy | Impulse control disorders |
| | Mean ± SD | 1.1 ± 2.1 | 3.8 ± 4 | 0.4 ± 1.1 | | Median (IR) | 1 | 5 | 0 | | Range | 0–14 | 0–19 | 0–8 | | Skewness | 3.3 | 1.4 | 3.9 | | Cronbach’s | 0.73 | 0.82 | 0.52 | | Corrected item-total correlation | 0.40–0.68 | 0.59–0.64 | 0.21–0.46 | | Floor effect (%) | 61.2% | 21.5% | 83.5% | | Ceiling effect (%) | 0% | 0% | 0% |
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SD: standard deviation. IR: interquartile range.
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