Table 2.

Results of model fitting and evaluation for the US-model⁶ and re-trained models including data from all four populations without and with interaction terms.

Model Type	Training Data	AUC training (mean ± SD)	Test Data	AUC test (mean ± SD)
US-Model	US (n=1631)	0.8553	EUR (n=249)	0.8240
			JAP (n=147)	0.6964
			FIN (n=102)	0.7209
			FIN, JAP (n=249)	0.7389
No interactions	All (n=1914)	0.8493 ± 0.0059	Left-out US, EUR, FIN, JAP (n=215)	0.8268 ± 0.0323
			Left-out JAP (n=15)	0.6550 ± 0.3334
			Left-out FIN (n=11)	0.7550 ± 0.1646
			Left-out FIN, JAP (n=26)	0.7494 ± 0.1371
Interactions	All (n=1914)	0.8681 ± 0.0091	Left-out US, EUR, FIN, JAP (n=215)	0.8308 ± 0.0309
			Left-out JAP (n=15)	0.6576 ± 0.3199
			Left-out FIN (n=11)	0.8020 ± 0.1324
			Left-out FIN, JAP (n=26)	0.8274 ± 0.1031

US=aneurysm data from the US, JAP=aneurysm data from Japan, FIN=aneurysm data from Finland. EUR=aneurysm data from Europe without Finland. “All” refers to data from all four populations without the excluded data for testing.