Table 1. Study population characteristics and hematological trait descriptive statistics for NHANES III participants.

Un-weighted means (± standard deviations) or percentages are given for demographics and plasma fibrinogen by subpopulation for adults >40 years in age in phase 2 of NHANES III.

Variable	Mean or %			Standard Deviation
	NHB	NHW	MA	NHB	NHW	MA
Age (yrs)	40.7	53.4	41	±16	±20	±17
Female (%)	58	60	50	-	-	-
Current Smokers (%)	37	26	24	-	-	-
Body Mass Index (kg/m2)	28.2	26.6	27.7	±6.67	±5.56	±5.42
Plasma Fibrinogen (g/L)	2.95	2.93	2.97	±0.51	±0.51	±0.50

Abbreviations: non-Hispanic black (NHB), non-Hispanic whites (NHW), Mexican Americans (MA)