Table 1: Numbers of CT examinations by sex and type of examination in patients under 22 years of age in Great Britain, 1993–2002.

CategoriesAllMalesFemales
(%) (%) (%)

Head and neck218,091 (60)125,295 (60)92,424 (60)
Abdomen and pelvis42,226 (12)24,020 (12)18,169 (12)
Chest31,074 (9)17,853 (9)13,200 (9)
Unknown24,039 (7)13,668 (7)10,367 (7)
Extremities17,853 (5)10,559 (5)7,285 (4)
Spine10,513 (3)6,493 (3)3,999 (3)
Miscellaneous17,763 (5)9,396 (4)8,357 (5)

Total361,559 (100)207,284 (100)153,801 (100)

Sex not known for 474 examinations (372 “head,” 37 “abdomen,” 21 each for “chest” and “spine,” 9 “extremities,” 4 “unknown,” and 10 “miscellaneous”).