CRP and retinopathy of prematurity: Z2: Discriminant probability formula that treatment is necessary in cases ROP develops = 8.401 − 0.4414 × GA + 0.00241 × BW − 0.2497 × CRP + 0.03031 × α1AG + 0.004085 × HP (Z2 ≥ 0 indicates no treatment, Z2 < 0 indicates treatment);