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. 2022 Jun 4;22:519. doi: 10.1186/s12879-022-07496-y

Table 1.

The GM (1,1) model of each STD

a b b/a GM (1,1) model
HIV infection − 0.077 2.998 − 39.026 x^(0)(k+1)=3.117e0.077k
Syphilis − 0.037 28.922 − 785.691 x^(0)(k+1)=29.482e0.037k
Gonorrhea − 0.090 6.050 − 67.028 x^(0)(k+1)=6.420e0.090k