Table 1.

Clinical and socio-demographic data of the NAC and placebo treatment groups

Characteristics	NAC group (n = 17)		Placebo group (n = 14)		F	df	P
	Mean	SD	Mean	SD
Current age	51.93	7.022	50.76	11.819	0.105	1/29	0.748
Years of education	10.86	5.318	9.18	5.040	0.812	1/29	0.375
Smoking onset age	16.86	2.507	16.18	3.340	0.396	1/29	0.534
Years of smoking	35.00	7.766	33.29	11.889	0.213	1/29	0.648
Pack-years	32.64	18.519	31.43	18.369	0.038	1/29	0.846
FTND	4.50	1.743	4.82	2.186	0.201	1/29	0.657
Gender	M = 7 F = 10		M = 2 F = 12		NA	NA	0.132*