Table 1.

Demographics and distribution of variables in the study population (N =88)

Variable	Number (%)
Sex (F/M)	59/29 (67/33)
Race
Caucasian	75 (85)
African-American	9 (10)
Others	4 (5)
OPRM1 Genotypes
AA	67 (76.1)
AG	20 (22.7)
GG	1 (1.1)
Basal infusion on PCA (number of patients, %)	73 (83)
	Mean	Range	SD
Age (years)	14.59	11–18.9	1.89
Levels (vertebrae)	11.3	1–13	2.5
Curve (degrees)	56.4	30–85	11.7
Pain scores (numerical rating scale)a
POD1	4.78	0.40–8.67	1.82
POD2	4.27	0.00–8.25	1.46
POD1 & 2	4.56	0.58–8.67	1.49
Morphine consumption (mg/kg)a
POD1	1.13	0.18–2.43	0.45
POD2	0.75	0.00–1.94	0.35
POD1 and 2	1.87	0.18–4.31	0.72
Propofol doseb mg/kg	88.9	42.9–148.3	21.2
Remifentanil doseb μg/kg (entire population)	130	69–295	44
AA genotype	131		45
AG+GG genotypes	128		44
Surgical duration (minutes) (entire population)	314	165–576	72
AA genotype	313		64
AG+GG genotypes	329		90

Abbreviations: NRS, numerical rating scale; POD, postoperative day.

^aValues from the postoperative period.

^bCumulative intraoperative doses.