Blood Harmane Concentrations in 497 Individuals Relative to Coffee, Cigarettes, and Food Consumption on the Morning of Testing

Table 1

Characteristics of 497 study participants.

Age (years)	66.0±14.4
Female gender	267 (53.7)
White race	445 (89.5)
Education (years)	15.4±3.5
Cumulative illness rating scale score	5.3±3.7
Current smoker	43 (8.7)
Number of cigarettes smoked per day (smokers only)	18.8±17.0
Cigarette pack years	10.8±20.9
Smoked on morning of phlebotomy	43 (8.7)
Number of cigarettes smoked on morning of phlebotomy	0.4±1.5
Drank coffee on morning of phlebotomy	214 (43.1)
Number of cups of coffee on morning of phlebotomy	0.7±1.0
Log blood harmane concentration in g^−10/ml	0.45±0.60

Values are means ± standard deviation or number (percent).