Impact of Allergic Diseases or Obstructive Sleep Apnea Risk on Severe Mycoplasma pneumoniae Pneumonia in Children: A Clinical Study and Nomogram Construction

: Children with MPP and comorbid AD or OSA risk are more likely to develop SMPP. Among children aged 6-12 years, RQLQ score is positively correlated with the severity of MPP. AD, PSQ score, LDH, and ferritin are independent risk factors for SMPP. Clinicians should be alert to the development of SMPP when children with MPP present with a history of AD, PSQ score >3.5, LDH >327.50 U/L, or ferritin >120.05 ng/mL. The visual nomogram model constructed by combining these risk factors demonstrates improved predictive performance for SMPP, with high predictive efficacy and accuracy. It has great clinical value and can be used for individualized risk assessment and early intervention. However, our proposed nomogram requires external validation prior to broader implementation.