TABLE 3

Exposure to at Least 1 Imaging Study in Term and Preterm Infants in the First Year After Discharge From Birth Hospitalization

TermPretermPmSva
N20 0492047
Radiographs, n (%)
 Chest3602 (18)634 (30)<.0010.08
 Abdominal597 (3.0)124 (5.9)<.0010.34
 Neck248 (1.2)61 (2.9)<.0010.12b
 Pelvis158 (0.8)29 (1.4).010.35
 Skull99 (0.5)9 (0.4).690.6
CT scans, n (%)
 Brain360 (1.8)48 (2.3).112.2
 Facial bones43 (0.2)5 (0.2).820.5
 Spine15 (0.1)2 (0.1).7511.4
 Chest13 (0.1)6 (0.2)<.012.2
 Abdominal and/or pelvis12 (0.1)4 (0.2).034.8
 Hip1 (<0.1)0 (<0.1).757
  • —, not applicable.

  • a mSv estimates per Linet et al30 except as indicated.

  • b mSv per Simpson et al.34