Table 2.

Serum C-reactive protein values (mg/L) in the 25^th, 50^th, and 75^th percentiles of controls in the Linxian Nutrition Intervention Trials cohort, overall and by baseline characteristics

	25th	50th	75th	P valuea
Overall	0.15	0.34	0.84
Age at baseline
<50	0.11	0.20	0.57	<0.001
≥50 to <60	0.17	0.35	0.86
≥60	0.17	0.45	1.07
Sex
Women	0.16	0.37	0.90	0.09
Men	0.14	0.32	0.78
Smoking (male)b
No	0.13	0.29	0.59	0.13
Yes	0.15	0.32	0.86
Alcohol drinking (male)c
No	0.14	0.28	0.77	0.38
Yes	0.15	0.37	0.78
BMI(kg/m2)
<25	0.14	0.32	0.79	0.002
≥25 to <30	0.26	0.58	1.08
≥30	0.44	1.22	2.03
HBsAg
No	0.15	0.34	0.86	0.16
Yes	0.12	0.26	0.53
HBcAg
No	0.14	0.32	0.80	0.82
Yes	0.15	0.35	0.86
HCsAg
No	0.16	0.35	0.87	0.009
Yes	0.11	0.25	0.49

^aWe tested for serum C-reactive protein concentration differences between groups using the Kruskal-Wallis Test.

^bSmoking in males; only one smoker was female.

^cAlcohol drinking in males; only 50 of 241 drinkers were female.