Table 1

Characteristics of children (0–14 years) with ALL included in the survival analysis: England and Wales, patients diagnosed 1971–90

n (%)
Birch and Marsden subcategories
 Acute lymphocytic leukaemia (Ia)1-150 5452  (98)
 Other lymphoid leukaemia (Ib)1-151 114 (2)
Sex
 Male3185 (57)
 Female2381 (43)
Age at diagnosis (years)
 Less than 2601 (11)
 2–93992 (72)
 10–14973 (17)
Calendar period of diagnosis
 1971–751429 (26)
 1976–801416 (25)
 1981–851347 (24)
 1986–901374 (25)
Deprivation category1-152
 1 (affluent)1222 (22)
 21128 (20)
 3925 (17)
 4943 (17)
 5 (deprived)947 (17)
 Unassigned (see text)401 (7)
Region of residence at diagnosis
 England and Wales5566 (100)
 England5316 (96)
  NHS region
   Northern and Yorkshire717 (13)
   Trent579 (10)
   Anglia and Oxford591 (11)
   North Thames723 (13)
   South Thames679 (12)
   South and West691 (12)
   West Midlands570 (10)
   North and West766 (14)
 Wales250 (4)
  • 1-150 Includes ICD-O morphology codes 9821, 9824.

  • 1-151 Includes ICD-O morphology codes 9820, 9822, 9823, 9825, 9850.

  • 1-152 The distribution of cases by deprivation category reflects an increased incidence of ALL among children of higher socioeconomic status, and the inclusion of Carstairs scores for Scottish EDs in the distribution used to generate the quintiles from which the deprivation categories were derived; a disproportionate number of deprived EDs are located in Scotland, so that EDs in England and Wales fall into an upper quintile of the national distribution slightly more than 20% of the time.