Table 2 Characteristics of included studies

Simpson et al 1974 [14]^a

330 children under 14 years hospitalized with acute lower respiratory infection

2 radiologists

McCarthy et al 1981 [15]

128 of 1566 children seen in a pediatric emergency room with a pulmonary infiltrate in chest radiography (as judged by the duty radiologist)

2 radiologists

Crain et al 1991 [9]

230 of 242 febrile infants under 8 weeks evaluated in an emergency room and who received a chest radiograph

2 radiologists

Kramer et al 1992 [12]

287 unreferred febrile children, aged 3–24 months, in an emergency unit

1 pediatrician,

1 duty radiologist,

1 "blind" pediatric radiologist

Davies et al 1996 [10]^b

40 children under 6 months, 25 with pneumonia and 15 with bronchiolitis, admitted to a tertiary care pediatric hospital

3 pediatric radiologists

Coakley et al 1996 [8]

113 previously well children under 3 years hospitalized with acute respiratory infections and no focal abnormality on radiography

2 radiologists