Table 7. Simple logistic regression analysis predicting unintended hospitalization following DBS.
| Variable | Category | Total cohort | UH positive, n | Ratio | Odds ratio | P value | 95% CI |
|---|---|---|---|---|---|---|---|
| Age at surgery, years | ≥ 70 | 27 | 7 | 25.9 | Reference | - | |
| 65–69 | 30 | 5 | 16.7 | 0.623 | 0.384 | 0.08 to 1.167 | |
| < 65 | 67 | 12 | 17.9 | 0.571 | 0.395 | -0.09 to 1.23 | |
| Disease duration, years | ≦10 | 41 | 8 | 19.5 | Reference | - | |
| > 10 | 83 | 16 | 19.3 | 0.985 | 0.975 | 0.383 to 2.536 | |
| Pre-op UPDRS part III | |||||||
| “Off” medication | ≦ 40 | 63 | 12 | 19.0 | Reference | - | |
| > 40 | 50 | 12 | 24.0 | 1.342 | 0.523 | 0.544 to 3.313 | |
| “On” medication | ≦ 25 | 59 | 11 | 18.6 | Reference | - | |
| > 25 | 56 | 13 | 23.2 | 1.319 | 0.547 | 0.535 to 3.252 | |
| Post-op UPDRS part III | |||||||
| “Off” med “On” stim | ≦ 40 | 54 | 10 | 18.5 | Reference | - | |
| > 40 | 20 | 4 | 20.0 | 1.100 | 0.885 | 0.302 to 4.008 | |
| “On” med “On” stim | ≦ 25 | 50 | 8 | 16.0 | Reference | - | |
| > 25 | 44 | 10 | 22.7 | 1.544 | 0.410 | 0.549 to 4.341 | |
| Pre-op PDQ-39 | ≦ 200 | 39 | 11 | 28.2 | Reference | - | |
| > 200 | 70 | 12 | 17.1 | 0.527 | 0.179 | 0.207 to 1.340 | |
| Post-op PDQ-39 | ≦ 200 | 56 | 7 | 12.5 | Reference | - | |
| > 200 | 35 | 12 | 34.3 | 3.652 | 0.016 | 1.271 to 10.495 | |
| Change in PDQ-39 | 0% | 63 | 8 | 12.7 | Reference | - | |
| > 0% | 27 | 10 | 37.0 | 4.044 | 0.011 | 1.377 to 11.874 |
UH: unintended hospitalization; UPDRS: Unified Parkinson’s Disease Rating Scale; PDQ-39: Parkinson’s Disease Questionnaire.