TABLE 3.

Diagnostic test utilization by center level of accreditation

Characteristic	Level 3 center, n = 68 a	Level 4 center, n = 274 a	p b
LTM EEG for seizure capture at 100%	50 (74%)	243 (89%)	.003 c
Brain MRI at 100%	51 (75%)	234 (85%)	.060
FDG‐PET	20 (0–60)	60 (30–90)	<.001 c
SPECT	0 (0–5)	10 (2–30)	<.001 c
HD‐EEG	0 (0–0)	0 (0–4)	.034 c
MEG/MSI	0 (0–1)	8 (1–30)	<.001 c
fMRI	0 (0–21)	28 (10–70)	<.001 c
Wada	5 (0–21)	10 (2–40)	<.001 c
ESI	0 (0–0)	0 (0–19)	.002 c
Genetic testing	5 (0–13)	15 (5–50)	<.001 c
TMS	0 (0–0)	0 (0–0)	.060
Neuropsychological testing	88 (25–100)	95 (80–100)	<.001 c
Social work evaluation	25 (10–96)	40 (10–80)	.4
Psychiatric evaluation	22 (4–42)	20 (10–40)	.3
Psychological evaluation	25 (9–50)	25 (10–50)	.7

Abbreviations: EEG, electroencephalography; ESI, EEG source imaging; FDG‐PET, fluorodeoxyglucose–positron emission tomography; fMRI, functional MRI; HD‐EEG, high‐definition EEG; LTM, long‐term monitoring; MEG/MSI, magnetoencephalography/magnetic source imaging; MRI, magnetic resonance imaging; SPECT, single‐photon emission computerized tomography; TMS, transcranial magnetic stimulation.

^a Statistics presented: n (%) or median (interquartile range).

^b Statistical tests performed: chi‐squared test of independence, Wilcoxon rank‐sum test, ESI EEG source imaging.

^c p < .05.