TABLE III.

Smoking Characteristics Among Prostate Cancer Cases and Controls

	EA cases (N = 105)	EA controls (N = 157)
Continuous variables	Mean ± SD	Mean ± SD	P-valuea
IIIA European Americans
Cigarettes per day	8.5 ± 11.2	9.5 ± 12.5	0.29
Length of smoking, years	10.3 ± 14.2	10.1 ± 14.0	0.79

Categorical variables	%	%	P-valueb
Current and former tobacco-users (n = 262)
Current	41.0	40.4
Former	4.8	9.0
Never	54.3	50.6	0.34c
Smoking intensity
1–19 cigarettes per day	70.2	68.2
20 or more cigarettes per day	29.8	31.8	0.78

	AA cases (N = 422)	AA controls (N = 400)
Continuous variables	Mean ± SD	Mean ± SD	P-valuea
IIIB African Americans
Cigarettes per day	8.0 ± 9.4	6.0 ± 8.3	0.002
Length of smoking, years	10.4 ± 16.2	8.5 ± 13.0	0.001

Categorical variables	%	%	P-valueb
Tobacco use (n = 692)
Current	27.3	22.6
Former	31.3	27.3
Never	41.4	50.1	0.08c
Smoking intensity
1 to 19 cigarettes per day	74.5	84.0
20 or more cigarettes per day	25.5	16.0	0.003

^aUnpaired, two-sample t-test.

^bChi-square analysis.

^cP trend.