Table 1.

Patient characteristics in the training and validation sets.

Clinical characteristics	Training set		Internal validation set	External validation set
	Patients	Healthy controls	MRI-negative patients	MRI-negative patients
	n = 36	n = 50	n = 22	n = 20
Age (years)	25.5 ± 9.0	29.8 ± 10.0	29.2 ± 8.6	15.9 ± 4.0
Sex (number of females)	24 (66.7%)	24 (48.0%)	12 (54.5%)	9 (45%)
Laterality
Right	17 (47.2%)	–	10 (45.5%)	8 (40%)
Left	19 (52.7%)	–	12 (54.5%)	12 (60%)

MRI, magnetic resonance imaging.