CRP and infection: For the 233 enrolled neonates, serological parameters (WBC, I/T, CRP, PCT, and PLT) differed, and the more abnormal the parameters were, the more severe the infection was as any two or more serological inflammatory parameters that meet the criteria (WBC ≥20 × 109/L [age ≥3 days] or WBC ≥30 × 109/L [6 h < age <3 days] or WBC <5 × 109/L [at any age]; CRP ≥10 mg/L; PCT ≥0.5 ng/mL [age >3 days]; PLT <100 × 109/L; I/T ≥ 0.16 [within 3 days] or I/T ≥ 0.12 [age >3 days]) could be clinically diagnosed with neonatal sepsis.21