TABLE 2

Diagnostic Testing and Treatment of the Cohort Stratified by Age Group

Age Category, y
Overall, %1–5, %6–12, %13–18, %a
n = 19 710n = 13 778n = 4842n = 1090
Diagnostic testing
 CBC9830 (50)6815 (50)2399 (50)616 (57)
 Serum electrolytes5635 (29)3790 (28)1432 (30)413 (38)
 Blood culture7853 (40)5595 (41)1826 (38)432 (40)
 C-reactive protein3553 (18)2345 (17)944 (20)264 (24)
 Viral testing (RSV, influenza)5251 (27)3900 (28)1113 (23)238 (22)
 CXR12 358 (63)8770 (64)2953 (61)635 (58)
Initial antibiotic therapy
 Penicillin/Aminopenicillins5430 (28)4237 (31)1020 (21)173 (16)
 Macrolide (alone or in combination)7364 (37)4080 (30)2610 (54)674 (62)
  • RSV, respiratory syncytial virus.

  • a P value <.001 for all comparisons across age categories.