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. 2020 Sep 23;17(19):6962. doi: 10.3390/ijerph17196962

Table 2.

Rules for data discretization.

Item Symbol Attribute Value Item Symbol Attribute Value Item Symbol Attribute Value
Δve Δve1 Δve<5 1 v2 v21 v2<55 1 ac1 ac11 ac1<0.5 1
Δve2 5<Δve<5 2 v22 55<v2<60 2 ac12 0.5<ac1<0.5 2
Δve3 Δve>5 3 v23 v2>60 3 ac13 ac1>0.5 3
Δde Δde1 Δde<5 1 d d1 d < 8 1 ac2 ac21 ac2<0.5 1
Δde2 5<Δde<5 2 d2 8<d<13 2 ac22 0.5<ac2<0.5 2
Δde3 Δde>5 3 d3 d > 13 3 ac23 ac2>0.5 3
v1 v11 v1<55 1 Δv Δv1 Δv<5 1 Δac Δac1 Δac<1.5 1
v12 55<v1<60 2 Δv2 5<Δv<5 2 Δac2 0.15<Δac<0.15 2
v13 v1>60 3 Δv3 Δv>5 3 Δac3 Δac>0.15 3