Table 2. Pattern of acute lymphoblastic subtypes in Nigerians compared with those of the United States, UK, and Malaysia, including numbers of cases and frequency (%).

	Ibadan/Nigeria*		USA (Caucasians)**		United Kingdom@		African-Americans***	Malaysians$
Age–groups in years	<15	≥15	<15	≥15	<15	≥15	<15	<15
c-ALL	4 (22.2)	8 (38.1)	217 (74.4)	37 (47.4)	398 (73.2)	23 (54.8)	16 (55.2)	7 (50.0)
Null ALL	2 (11.1)	1 (4.8)	21 (7.2)	?	68 (12.5)	11 (26.2)	4 (13.8)	3 (21.4)
T-ALL	7 (38.9)	11 (52.4)	45 (15.5)	20 (25.6)	73 (13.5)	5 (11.9)	9 (31.0)	4 (28.6)
B-ALL	4 (22.2)	1 (4.8)	8 (2.7)	?	4 (0.7)	1 (2.4)	0 (0.0)	0 (0.0)
Unclassifiable	1 (5.6)	0 (0.0)	0 (0.0)	21 (26.9)	0 (0.0)	2 (4.8)	0 (0.0)	0 (0.0)
Total	18 (100)	21 (100)	291 (100)	78 (100)	542 (100)	42 (100)	29 (100)	14 (100)

^*Ibadan, Nigeria data based on this report.

^**USA (Caucasians) data based on [38]

^***African-American data based on [39]

^@United Kingdom (<15 years) data based on [37] and (≥15 years) data based on [61]

^$Malaysia data based on [62]