Table 2. Quitters among participants or respondents.

	Males	Females	Total
Total	6/69 ( 8.7)	2/32 ( 6.3)	8/101 ( 7.9)
Genotypes with no enzyme activity* (One participant’s DNA was not available)
0	1/16 ( 6.3)	0/ 6 ( 0.0)	1/22 ( 4.5)
1	2/33 ( 6.1)	0/15 ( 0.0)	2/48 ( 4.2)
2	3/17 (17.6)	2/10 (20.0)	5/27 (18.5)
3	0/ 2 ( 0.0)	0/ 1 ( 0.0)	0/ 3 ( 0.0)
How do you feel the genotype tests ? (34 male respondents and 7 female respondents)
Glad to have participated	4/19 (21.1)	2/ 5 (40.0)	6/24 (25.0)
Should not have participated	0/ 0	0/ 0	0/ 0
Neither	0/ 7 ( 0.0)	0/ 1 ( 0.0)	0/ 8 ( 0.0)
Seems not to have participated	2/ 6 (33.3)	0/ 1 ( 0.0)	2/ 7 (28.6)
Unspecified	0/ 2 ( 0.0)	0/ 0	0/ 2 ( 0.0)

Percentages in parentheses.

*: GSTM1 null, GSTT1 null, and NQO1 609TT.