Unveiling the secrets of gastrointestinal mucous adenocarcinoma survival after surgery with artificial intelligence: A population-based study

Table 4 Model’s performance at 1-, 3- and 5-years’ overall survival prediction

	Discovery cohort			Validation cohort			Test cohort
	1 yr	3 yr	5 yr	1 yr	3 yr	5 yr	1 yr	3 yr	5 yr
AUC	0.7953	0.8034	0.7971	0.7757	0.7843	0.7772	0.7938	0.7888	0.7871
AUC, 95%CI	0.7817-0.8090	0.7933-0.8136	0.7873-0.8069	0.7501-0.8012	0.7650-0.8036	0.7587-0.7958	0.7566-0.8310	0.7603-0.8173	0.7597-0.8146
Specificity	0.7688	0.7675	0.7985	0.6493	0.7260	0.7586	0.7182	0.6869	0.7296
Sensitivity	0.6742	0.6963	0.6595	0.7775	0.7242	0.6746	0.7386	0.7507	0.7127
Accuracy	0.7536	0.7421	0.7365	0.6697	0.7253	0.7203	0.7212	0.7086	0.7222
NPV	0.9250	0.8200	0.7441	0.9388	0.8234	0.7355	0.9400	0.8424	0.7655
PPV	0.3581	0.6243	0.7253	0.2964	0.5987	0.7010	0.3148	0.5527	0.6723

AUC: Area under receiver operating characteristic curve; CI: Confidence interval; NPV: Negative predictive value; PPV: Positive predictive value.