Brief Article
Copyright ©2013 Baishideng Publishing Group Co.
World J Clin Pediatr. Nov 8, 2013; 2(4): 65-69
Published online Nov 8, 2013. doi: 10.5409/wjcp.v2.i4.65
Table 1 Baseline characteristics
MorphineMorphine + tramadol
Sample size1812
Age (yr), Mean (range)11.5 (3-20)13.4 (7-20)
Gender
Male96
Female96
Weight (kg), mean (range)38.7 (11.6-77.4)52 (27.0-77.4)a
Hemoglobin (mg/dL), mean (range)9.0 (6.0- 11.9)9.4 (6.5-12.0)