Table 1. Frequency of diagnostic... | American Society of Hematology

Table 1.

Frequency of diagnostic traumatic lumbar puncture positive for blasts according to patients' age and white blood cell count at the time of diagnosis

Factor	Category	No. of patients (%)			P value^*	P value^†
Factor	Category	Nontraumatic	TLP⁻	TLP⁺	P value^*	P value^†
Age (y)	< 1	15 (79)	0 (0)	4 (21)	.30	.96
	≥ 1 to < 10	306 (80)	36 (9)	43 (11)
	≥ 10	111 (78)	18 (13)	13 (9)
WBC (× 10⁹/L)	≤ 50	329 (80)	48 (12)	32 (8)	< .001	.12
	> 50 to ≤ 100	39 (83)	3 (6)	5 (11)
	> 100	64 (71)	3 (3)	23 (26)

Factor	Category	No. of patients (%)			P value^*	P value^†
Factor	Category	Nontraumatic	TLP⁻	TLP⁺	P value^*	P value^†
Age (y)	< 1	15 (79)	0 (0)	4 (21)	.30	.96
	≥ 1 to < 10	306 (80)	36 (9)	43 (11)
	≥ 10	111 (78)	18 (13)	13 (9)
WBC (× 10⁹/L)	≤ 50	329 (80)	48 (12)	32 (8)	< .001	.12
	> 50 to ≤ 100	39 (83)	3 (6)	5 (11)
	> 100	64 (71)	3 (3)	23 (26)

TLP indicates traumatic lumbar puncture; WBC, white blood cell count.

From comparison of TLP⁺ versus others.

From comparison of TLP⁺ or TLP⁻ versus nontraumatic.