Comparison of proportions of reliable improvement between the bilateral subthalamic nucleus deep brain stimulation group (STN-DBS) and non-surgical Parkinson’s disease group (NSPD) on subtests of the word test-revised (TWT-R)
| TWT-R subtest | STN-DBS (n = 5) | NSPD (n = 16) | z | p Value |
|---|---|---|---|---|
| % RI | % RI | |||
| *Significant difference between proportions at p = 0.05. | ||||
| ANT, antonyms; ASS, associations; DEF, definitions; MULDEF, multiple definitions; RI, reliable improvement; SEMAB, semantic absurdities; SYN, synonyms; TWT-R, the word test-revised. | ||||
| ASS | 40 | 44 | −0.36 | 0.719 |
| SYN | 60 | 50 | −0.12 | 0.903 |
| SEMAB | 40 | 50 | −0.12 | 0.903 |
| ANT | 40 | 12 | 0.75 | 0.456 |
| DEF | 60 | 31 | 0.64 | 0.523 |
| MULDEF | 80 | 12 | 2.38 | 0.017* |