Table 1.

Patient demographics

	Placebo (n = 21)	Montelukast (n = 20)	P
Male, n (%)	8 (38)	9 (45)	.76
Age, median (range), y	27 (19-52)	26.5 (16-64)	.96
Hospitalizations in last 3 y, n	2 (0-3)	3 (1.5-7)	.13
ED visits in last 3 y, n	2 (1-4)	5 (1.5-7)	.16
Admissions for pain crises in last 3 y, n	7.5 (4-15)	10 (6.5-20)	.46
WBC, ×109/L	7.1 (5.5-8.6)	7.6 (5.5-9.4)	.50
Hb, g/dL	8.7 (8.2-9.7)	9.1 (8.3-9.9)	.34
Reticulocyte count (%), %	8.85 (5.50-13.1)	9.15 (8.35-9.9)	.53

Hb, hemoglobin; WBC, white blood cell count.

Unless otherwise noted, data are median (IQR).