Short post-injection seizure duration is associated with reduced power of ictal brain perfusion SPECT to lateralize the seizure onset zone

EJNMMI Research

Tab 1 Demographic and clinical data

	Median (IQR)	P-value of between-subjects effect
	Median (IQR)	Injection latency	Seizure duration	Interaction
Age at ictal SPECT, y	38 (26–49)	0.052	0.403	0.997
Sex, % females	47.2	0.327	0.481	0.949
Age at first seizure, y	15 (7–24) (n = 64)	0.240	0.708	0.427
Duration of disease at SPECT, y	20 (10–31) (n = 65)	0.615	0.151	0.866
Mean seizure frequency in the last 12 mo before SPECT, seizures/mo	9 (5–22) (n = 50)	0.650	0.783	0.770
Tracer of ictal SPECT, % ^99mTc-ECD	20.5	0.978	0.051	0.445
Injected tracer dose, MBq	590 (505–700) (n = 115)	0.529	0.561	0.618
Delay between tracer injection and scan start, min	141 (100–188) (n = 93)	0.752	0.834	0.735