Table 1:

Clinical characteristic of ALL and control patients

	ALL Patients	Control Patients	Student t test
Number	42	22
Number (%) male	27 (64)	15 (68)
Age at examination (y)
Range	6.9–27.6	7.2–31.8	P = .16
Mean ± SD	17.4 ± 4.6	15.4 ± 5.5
Age at diagnosis (y)
Range	1.2–13.7	0.5–13.0	P = .46
Mean ± SD	5.2 ± 2.9	5.9 ± 4.0
Interval from diagnosis (y)
Range	5.0–18.8	5.6–20.4	P = .015
Mean ± SD	12.2 ± 3.6	9.5 ± 4.2

Note:—ALL indicates acute lymphoblastic leukemia.