Table 2.

Longitudinal investigations of serum IgG subclass concentrationsa

Age (mo)Serum IgG subclass concn (mg/dl)
IgG1IgG2IgG3IgG4
Patient
 2411010<1<1
 364509022<1
 385208027<1
 39570100303
 421,09031032<1
 50960733<1
 519201022<1
 528009030<1
 531,0009030<1
 541,0009030<1
Normal childrenb
 9–24286–68030–32713–821–65
 36–48381–88470–44317–901–116
  • a Data collected between 24 and 36 months were not included because intravenous immunoglobulin infusions were given during that period.

  • b Values represent 95 percentile ranges for the ages given.