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Table 1 Sample Size Computations

From: Transcranial magnetic resonance-guided focused ultrasound pallidothalamic tractotomy for patients with X-linked dystonia-parkinsonism: a study protocol

F value

Minimum Sample (n*)

Inflated Sample Formula: n* / (1-DOR)

0.25 (Medium Effect)

62.5

69.5

0.30

43.5

48.5

0.35

32.5

36

0.40 (Large Effect)

24.5

27.5