Table 1.

Characteristics of workers exposed to lead at a secondary lead smelter and non-exposed workers.^†

	Exposed N = 136‡	Non-Exposed N = 83
Mean age (yrs)*	32.9 (8.5)	30.2 (9.3)
Mean body mass index (kg/m2)	27.8 (5.4)	27.3 (5.5)
Race*
Caucasian	54 (39.7%)	51 (61.4%)
African-American	82 (60.3%)	32 (38.6%)
Smoking status
Never smoker	70 (51.5%)	34 (41.0%)
Former smoker	19 (14.0%)	14 (16.9%)
Current smoker	47 (34.6%)	35 (42.2%)
Mean pack years of smoking	4.8 (9.6)	4.0 (7.5)
Alcohol use (1 drink/wk, on average, during last 6 months)	84 (61.8%)	46 (55.4%)

Notes:

^†Results are presented as mean (standard deviation) or number (%);

^‡A few individual data items were missing for some participants. The total number of exposed and non-exposed participants used in these analyses ranged from 135 to 136 and from 82 to 83, respectively, because of missing data.

^*P < 0.05.