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. 2015 Feb 18;8(1):132–137. doi: 10.3980/j.issn.2222-3959.2015.01.25

Table 1. A transition matrix which shows the probability of movement from one state to another state in the cycle of diabetic retinopathy.

DR stages	Mild (S1)	Moderate (S2)	Severe (S3)	PDR (S4)	Blindness (S5)
Mild (S1)	θ₁₁	θ₁₂	θ₁₃	θ₁₄	θ₁₅
Moderate (S2)	θ₂₁	θ₂₂	θ₂₃	θ₂₄	θ₂₅
Severe (S3)	θ₃₁	θ₃₂	θ₃₃	θ₃₄	θ₃₅
PDR (S4)	θ₄₁	θ₄₂	θ₄₃	θ₄₄	θ₄₅
Blindness (S5)	θ₅₁	θ₅₂	θ₅₃	θ₅₄	θ₅₅