. Author manuscript; available in PMC: 2010 Nov 1.

Published in final edited form as: Brain Behav Immun. 2009 Jul 15;23(8):1109–1116. doi: 10.1016/j.bbi.2009.07.001

Table 1.

Demographics, pre-treatment characteristics, and relationship to circulating IL-6.

IL-6 levels (pg/mL) – square root transformed (Mean +/− S.D).
Gender	Male (67%) 0.95 +/− 0.89	Female (33%) 1.12 +/− 0.65	r<0.01; p=0.36
Race	Caucasian (87%) 1.02 +/− 0.85	African-American (13%) 0.93 +/− 0.64	r<0.01; p=0.73
Nicotine use	Yes (53%) 0.88 +/− 0.99	No (47%) 1.09 +/− 0.67	r=0.01; p=0.91

	Mean +/− S.D.	Regression with square-root of IL-6
BDI	7.2 +/− 6.9	B = −0.009 +/− 0.013	r=0.08; p=0.49
PSQI	6.1 +/− 3.7	B = 0.007 +/− 0.027	r=0.03; p=0.80
Weight (kg)	84.9 +/− 16.7	B = 0.015 +/− 0.005	r=0.30; p<0.01
Age (years)	47.3 +/− 11.8	B = 0.018 +/− 0.008	r=0.25; p<0.05