Table 1.
Beta estimates for health status measures collected at 2 follow-ups.
| 6 months postop. | 1 year postop. | ||||||
|---|---|---|---|---|---|---|---|
| N | Estimate (95% CI) | P value | N | Estimate (95% CI) | P value | ||
| UPDRS II | Age | 39 | −0.05 (−0.34, 0.23) | 0.7058 | 32 | 0.03 (−0.3, 0.36) | 0.8438 |
| Disease duration | 38 | −0.45 (−1.00, 0.11) | 0.1127 | 31 | 0.21 (−0.56, 0.97) | 0.5859 | |
| BMI | 37 | 0.49 (0.04, 0.94) | 0.0332 | 32 | 0.68 (−0.002, 1.37) | 0.0507 | |
| Laterality (versus unilateral) | |||||||
| Staged bilateral | 39 | 1.16 (−4.58, 6.89) | 0.6849 | 32 | 0.53 (−6.75, 7.82) | 0.8819 | |
| Simultaneous bilateral | 39 | −3.68 (−12.69, 5.32) | 0.4118 | 32 | −5.46 (−14.34, 3.42) | 0.2179 | |
| Electrode passes (right) | 29 | 2.09 (−0.41, 4.60) | 0.0978 | 24 | 1.96 (−1.77, 5.69) | 0.2876 | |
| Electrode passes (left) | 35 | −1.21 (−4.29, 1.87) | 0.4300 | 30 | −2.18 (−6.14, 1.78) | 0.2681 | |
| Electrode passes (total) | 36 | 0.31 (−1.15, 1.76) | 0.6731 | 30 | 0.00 (−1.96, 1.97) | 0.9963 | |
| % equivalent levodopa dose | 37 | 1.83 (−3.93, 7.58) | 0.5233 | 30 | 0.89 (−6.15, 7.94) | 0.7967 | |
| On UPDRS III | 39 | 0.09 (−0.21, 0.38) | 0.5535 | 31 | 0.22 (−0.10, 0.54) | 0.1709 | |
| Tremor | 39 | −0.95 (−5.78, 3.88) | 0.6909 | 32 | 1.35 (−4.41, 7.12) | 0.6345 | |
| Dyskinesia | 39 | −2.46 (−7.28, 2.36) | 0.3072 | 32 | −2.06 (−7.86, 3.74) | 0.4736 | |
| Freezing | 39 | 2.32 (−2.97, 7.62) | 0.3792 | 32 | 3.85 (−2.55, 10.26) | 0.2284 | |
| Falls/balance | 39 | 6.48 (1.11, 11.84) | 0.0193 | 32 | 6.45 (−0.38, 13.28) | 0.0634 | |
| Marital status | 38 | −1.86 (−7.35, 3.63) | 0.4958 | 31 | 2.74 (−3.88, 9.36) | 0.4041 | |
|
| |||||||
| EQ-5D index | Age | 45 | 0.00 (−0.01, 0.00) | 0.3403 | 36 | 0.00 (−0.01, 0.01) | 0.9897 |
| Disease duration | 43 | 0.01 (0.00, 0.02) | 0.1810 | 35 | −0.01 (−0.02, 0.00) | 0.0696 | |
| BMI | 45 | 0.001 (−0.009, 0.011) | 0.8450 | 36 | −0.002 (−0.014, 0.011) | 0.7983 | |
| Laterality (versus unilateral) | |||||||
| Staged bilateral | 44 | 0.08 (−0.02, 0.19) | 0.1252 | 36 | −0.01 (−0.14, 0.12) | 0.9127 | |
| Simultaneous bilateral | 44 | 0.13 (−0.04, 0.29) | 0.1351 | 36 | 0.003 (−0.15, 0.16) | 0.9654 | |
| Electrode passes (right) | 33 | −0.02 (−0.06, 0.02) | 0.3494 | 28 | −0.03 (−0.09, 0.04) | 0.3837 | |
| Electrode passes (left) | 38 | 0.04 (−0.02, 0.11) | 0.2006 | 32 | 0.07 (0.00, 0.14) | 0.0508 | |
| Electrode passes (total) | 41 | 0.02 (−0.01, 0.05) | 0.2458 | 34 | 0.01 (−0.03, 0.04) | 0.6988 | |
| Equivalent levodopa dose | 42 | −0.07 (−0.19, 0.04) | 0.2000 | 34 | 0.06 (−0.06, 0.19) | 0.3138 | |
| On UPDRS III | 44 | −0.01 (−0.01, 0.00) | 0.0050 | 35 | 0.00 (−0.01, 0.00) | 0.6310 | |
| Tremor | 44 | 0.03 (−0.07, 0.13) | 0.5516 | 36 | 0.07 (−0.03, 0.17) | 0.1602 | |
| Dyskinesia | 44 | −0.01 (−0.11, 0.09) | 0.8448 | 36 | 0.02 (−0.09, 0.12) | 0.7197 | |
| Freezing | 44 | −0.03 (−0.13, 0.08) | 0.5955 | 36 | −0.09 (−0.19, 0.01) | 0.0762 | |
| Falls/balance | 44 | −0.06 (−0.17, 0.05) | 0.269 | 36 | −0.12 (−0.23, −0.02) | 0.0191 | |
| Marital status | 44 | −0.04 (−0.15, 0.08) | 0.4992 | 35 | −0.04 (−0.16, 0.07) | 0.4668 | |