Table 6. Changes in fasting plasma glucose levels according to the pretest and posttest results of each group.

	Group	Pre (mean ± SD)	Post (mean ± SD)
FPG (mg/dl)	Ex smoker	85.8 ± 3.8	90.7 ± 14.5
	Non Ex smoker	82.3 ± 6.1	84.2 ± 5.2
	Ex Nonsmoker	91.3 ± 4.2	87.8 ± 6.3
	Non Ex Nonsmoker	89.8 ± 5.2	86.2 ± 4.5
Fgroup*time=1.63 (0.216), Fgroup=41.28 (0.311), Ftime=0.00 (0.948)

FPG: fasting plasma glucose.