Table 1.

Incidence of ICI in Outpatients Less Than Two Years Old Presenting for Evaluation

First AuthorYearDesignEligibility CriteriaN <2 YearsNeurologic Status of PopulationIncidence of ICI
Schunk231996Retrospective cohort<18 y, GCS = 15, nonfocal neuro, CT for HT96GCS = 15, nonfocal neuro6.1% (6/96; 5/6 <1 y)
Quayle81997Prospective cohort<18 y, nontrivial HT, CT/SR134Nontrivial HT; 89% alert5.2% (7/134) overall; by age: ≤3 mo: 16% (5/32); 4 to 6 mo: 0% (0/22) 7 to 12 mo: 4% (2/49); 13 to 24 mo: 0% (0/26)
Greenes211999Prospective cohortAge <2 in ED for HT60892% alert/active. 5% alert but quiet4.9% (30/608) overall; by age: <3 mo: 13% (12/92); 3 to 5 mo: 7% (4/56) 6 to 11 mo: 5% (9/168); 11 to 23 mo: 1.8%
(5/271)
Ramundo201995Prospective cohort<19 with CT for HT; any GCS3776% GCS = 15 85% GCS ≥1322% (8/37; also includes basilar and depressed SF)
Gruskin191999Retrospective cohortAge <2 in ED for HT27895% alert (264/278)3.4% for alert patients (9/264); overall, 4.3%
(12/278)
Dietrich141993Prospective cohortAge <21 with HT who had CT7180% GCS = 15 (57/71)3.5% for GCS = 15 (2/57); overall, 4.2% (3/71)
Stewart321993Retrospective cohort<3 mo in ED for any trauma111
51 with HT
?5.9% (3/51)
  • GCS indicates Glasgow Coma Score; neuro, neurologic examination; ED, emergency department.