. Author manuscript; available in PMC: 2016 Apr 1.

Published in final edited form as: Pharmacogenomics J. 2015 Jan 6;15(5):436–442. doi: 10.1038/tpj.2014.79

Table 1.

Characteristics of participants

	Whites (N=216)	Blacks (N=43)
Age (year) (median (IQR))	8.4 (7.1–11.0)	8.8 (7.1–11.2)
Weight (Kg) (median (IQR))	33.8 (25.8–46.3)	34.7 (26.2–54.1)
BMI z scores	0.7 (−0.2–1.6)	1.2 (0.0–2.0)
Intra-operative morphine requirement (mg/kg) (median (IQR))	0.19 (0.17–0.21)	0.20 (0.16–0.20)
Sex (N, %)
Male	105 (49%)	19 (44%)
OSA (N, %)
Yes	93 (43%)	29 (67%)
PONV (N, %)
Yes	36 (17%)	3 (7%)
Respiratory Depression (N, %)
Yes	68 (32%)	17 (40%)
Total morphine requirement (mg/kg)	0.25 (0.08)	0.30 (0.09)

Age, weight, BMI z score and intra-operative morphine requirement are shown as median and inter-quartile range (IQR); total morphine requirement is shown as mean (standard deviation); sex and Obstructive Sleep Apnea (OSA) are shown as frequencies and proportions. BMI z scores were calculated using CDC growth charts.