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. 2019 Oct 31;7(4):e15794. doi: 10.2196/15794

Table 4.

Annual volume of emergency department (ED) visits meeting phenotype criteria (November 1, 2017, to October 31, 2018, ED discharges only).

Validation Total patients (n) Total visits (n) Algorithm 1 (n) Algorithm 2 (n)
Internal

Department





Hospital X I 44,291 67,995 343 49


Health System X II 22,344 29,309 56 11


Health System X III 24,738 38,128 251 46


Health System X IV 27,220 44,505 324 73


Health System X V 44,780 65,837 509 70


Health System X VI 17,797 22,540 25 0

Total 181,170 268,314 1508 249

Average 30,195 44,719 251.3 41.5
External

Department





Health System Y I 9818 15,749 37 4


Health System Y II 15,220 25,556 91 2


Health System Y III 22,332 30,912 57 4


Health System Y IV 22,080 38,086 100 4


Health System Y V 5467 6190 24 1


Health System Y VI 34,576 46,335 98 0


Health System Y VII 32,879 43,034 110 5

Total 142,372 205,862 517 20

Average 20,339 29,409 74 3