Table 2.

Proportion of patients with a correct diagnosis included in the top 10 differential diagnosis list generated by artificial intelligence in patients who visited the internal medicine outpatient clinic at Nagano Chuo Hospital without an appointment and then admitted within 30 days for 3 years from May 2019 to April 2022.

	Total (N=381), n/N (%)	First yeara (n=219), n/N (%)	Second yearb (n=72), n/N (%)	Third yearc (n=90), n/N (%)	P value
Overall accuracy	172/381 (45.1)	97/219 (44.3)	32/72 (44.4)	43/90 (47.7)	.85
Age ≥65 years	110/243 (45.3)	69/159 (43.4)	15/35 (42.9)	26/49 (53.1)	.47
Age <65 years	62/138 (44.9)	28/60 (46.7)	17/37 (45.9)	17/41 (41.5)	.87
Men	102/205 (49.8)	53/114 (46.5)	20/40 (50)	29/51 (56.9)	.47
Women	70/176 (39.8)	44/105 (41.9)	12/32 (37.5)	14/39 (35.9)	.77
Single chief complaint	103/207 (49.8)	53/115 (46.1)	23/40 (57.5)	27/52 (51.9)	.43
Multiple chief complaints	69/174 (39.7)	44/104 (42.3)	9/32 (28.1)	16/38 (42.1)	.34
Common disease	142/257 (55.3)	79/146 (54.1)	27/45 (60)	36/66 (54.5)	.78
Uncommon disease	30/124 (24.2)	18/73 (24.7)	5/27 (18.5)	7/24 (29.2)	.67
Typical presentation	160/298 (53.7)	88/164 (53.7)	29/60 (48.3)	43/74 (58.1)	.53
Atypical presentation	12/83 (14.5)	9/55 (16.4)	3/12 (25)	0/16 (0)	.10

^aThe first year was from May 1, 2019, to April 30, 2020.

^bThe second year was from May 1, 2020, to April 30, 2021.

^cThe third year was from May 1, 2021, to April 30, 2022.