Table 2.
Results of multivariate modelling for caregiver burden
| Variable | Direction of association | Chi square value | Significance |
|---|---|---|---|
| RQI total | − | 60.7 | 6.5 × 10−15*** |
| Caregiver-rated BIS attentional | + | 14.7 | 0.00013*** |
| BDI total | + | 14.2 | 0.00016*** |
| QUIP-RS hypersexuality | + | 9.0 | 0.0027** |
| Caregiver-rated EQ | – | 7.7 | 0.0057** |
| Log0 LEDD | + | 6.0 | 0.026* |
| UPDRS Part III total | + | 4.9 | 0.027* |
| Hayling Category A errors | + | 4.5 | 0.035* |
See Methods for full description of instruments
BDI Beck Depression Inventory, BIS Barratt Impulsiveness Scale, EQ Empathy Quotient, LEDD levodopa equivalent daily dose (natural logarithm employed due to nonparametric distribution), QUIP-RS Questionnaire for Impulsive-Compulsive Disorders in Parkinson’s Disease Rating Scale, RQI Relationship Quality Index, UPDRS Unified Parkinson’s Disease Rating Scale
*p < 0.05; **p < 0.01; ***p < 0.001