Table 2.

Accuracy of the proposed surgical margin to predict postoperative deficit in face weakness ($d_1^{*}$ = −1.9 mm), hand weakness ($d_2^{*}$ = 2.3 mm), leg weakness ($d_3^{*}$ = −4.8 mm), language ($d_{4-8}^{*}$ = 1.4, 1.6, 0.7, −2.8 mm) and visual field ($d_9^{*}$ = −4.6 mm) in the modeling dataset (Supplemental Table 1, n=40). Values are listed for eleven different modeling groups/subgroups: seizure free (n=24), not seizure free (n=16), combined set (n=40), age at MRI ≤ 5 years old (n=11), age at MRI 6–10 years old (n=11), age at MRI > 10 years old (n=18), daily seizures (n=21), weekly seizures (n=9) and monthly seizures (n=8). [ ] indicates the probability of seizure freedom while preserving d* (i.e., d > d* in mm): P(seizure freedom|$d_i^{*}$).

Group (n)	$d_1^{*}$	$d_2^{*}$	$d_3^{*}$	$d_4^{*}$	$d_5^{*}$	$d_6^{*}$	$d_7^{*}$	$d_8^{*}$	$d_9^{*}$
Seizure free (24)	0.83	0.96	0.96	0.96	0.75	0.83	0.88	0.75	0.92
Not seizure free (16)	0.88	1.00	0.94	0.94	0.94	1.00	0.94	0.94	0.81
Combined set (40)	0.85 [0.67]	0.98 [0.79]	0.95 [0.88]	0.95 [0.79]	0.83 [0.83]	0.90 [0.67]	0.90 [0.79]	0.83 [0.67]	0.88 [0.67]
age at MRI ≤ 5 years old (11)	0.73 [0.40]	1.00 [0.40]	0.91 [0.60]	1.00 [0.80]	0.91 [0.60]	0.91 [0.60]	1.00 [0.80]	0.91 [0.60]	0.82 [0.40]
age at MRI 6–10 years old (11)	1.00 [1.00]	1.00 [1.00]	1.00 [1.00]	1.00 [0.86]	0.73 [0.86]	1.00 [0.86]	1.00 [0.86]	0.82 [0.86]	1.00 [0.86]
age at MRI > 10 years old (18)	0.83 [0.67]	0.94 [0.83]	0.94 [0.92]	0.89 [0.75]	0.83 [0.92]	0.83 [0.58]	0.78 [0.75]	0.78 [0.58]	0.83 [0.58]
Daily seizure (21)	0.81 [0.45]	1.00 [0.73]	0.91 [0.82]	0.95 [0.82]	0.86 [0.91]	0.91 [0.73]	0.95 [1.00]	0.91 [0.73]	0.91 0.82]
Weekly seizure (9)	0.89 [1.00]	1.00 [1.00]	1.00 [1.00]	0.89 [0.83]	0.67 [0.67]	0.89 [0.67]	0.89 [0.83]	0.78 [0.67]	0.78 [0.67]
Monthly seizure (8)	1.00 [0.80]	0.88 [0.60]	1.00 [0.80]	1.00 [0.80]	1.00 [0.80]	0.88 [0.60]	0.75 [0.40]	0.88 [0.60]	0.88 [0.60]