Table 3.

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 validation dataset (Table 1, n=37). Values are listed for nine different validation groups/subgroups: seizure free (n=23), not seizure free (n=14), combined set (n=37), age at MRI ≤ 5 years old (n=8), age at MRI 5–10 years old (n=6), age at MRI > 10 years old (n=23), daily seizures (n=12), weekly seizures (n=4) and monthly seizures (n=17). [ ] indicates the observed probability of seizure freedom while preserving d* (i.e., d > d* in mm): P(seizure freedom|$d_{\mathrm{i}}^{*}$).

Group (n)	$d_1^{*}$	$d_2^{*}$	$d_3^{*}$	$d_4^{*}$	$d_5^{*}$	$d_6^{*}$	$d_7^{*}$	$d_8^{*}$	$d_9^{*}$
Seizure free (23)	0.91	0.96	0.96	0.96	0.91	0.91	0.96	0.96	0.91
Not seizure free (14)	0.86	0.93	0.93	0.93	0.93	1.00	0.86	1.00	0.93
Combined set (37)	0.89 [0.78]	0.95 [0.78]	0.95 [0.91]	0.95 [0.87]	0.92 [0.91]	0.95 [0.83]	0.92 [0.87]	0.97 [0.87]	0.92 [0.83]
age at MRI ≤ 5 years old (8)	0.75 [0.57]	0.88 [0.71]	1.00 [0.86]	0.88 [0.57]	0.75 [0.71]	0.88 [0.57]	0.88 [0.57]	0.88 [0.57]	0.88 [0.57]
age at MRI 6–10 years old (6)	1.00 [1.00]	1.00 [1.00]	1.00 [1.00]	1.00 [1.00]	0.83 [1.00]	1.00 [1.00]	1.00 [1.00]	1.00 [1.00]	0.83 [1.00]
age at MRI > 10 years old (23)	0.91 [0.85]	0.96 [0.77]	0.91 [0.92]	0.96 [1.00]	1.00 [1.00]	0.96 [0.92]	0.91 [1.00]	1.00 [1.00]	0.96 [0.92]
Daily seizure (12)	0.92 [0.88]	0.92 [0.50]	0.92 [0.75]	0.92 [0.75]	0.92 [0.75]	0.92 [0.75]	0.92 [0.75]	0.92 [0.75]	0.83 [0.63]
Weekly seizure (4)	0.75 [1.00]	1.00 [1.00]	1.00 [1.00]	0.75 [1.00]	1.00 [1.00]	1.00 [1.00]	0.5 [1.00]	1.00 [1.00]	1.00 [1.00]
Monthly seizure (17)	0.94 [0.80]	0.94 [0.90]	0.94 [1.00]	1.00 [1.00]	0.94 [1.00]	0.94 [0.90]	1.00 [1.00]	1.00 [1.00]	0.94 [1.00]