Table 5 GSTs genotype frequencies in periodontitis patients and controls according to their smoking status^♦

GSTM1

Wild

59 (45.7)

63 (48.5)

0.38

1.00

31 (53.4)

25 (43.9)

0.20

1.00

Null

70 (54.3)

67 (51.5)

0.90 (0.55–1.46)

27 (46.6)

32 (56.1)

1.47 (0.70–3.06)

GSTT1

Wild

96 (74.4)

110 (84.6)

0.03*

1.00

48 (82.8)

43 (75.4)

0.23

1.00

Null

33 (25.6)

20 (15.4)

0.53 (0.28–0.98)

10 (17.2)

14 (24.6)

1.56 (0.63–3.88)

GSTM1/GSTT1

Both wild

44 (34.1)

50 (38.5)

0.07

1.00

24 (41.4)

21 (36.8)

0.11

1.00

Either null

67 (51.9)

73 (56.2)

1.04 (0.62–1.76)

31 (53.4)

26 (45.6)

0.96 (0.44–2.10)

Both null

18 (14.0)

7 (5.4)

0.34 (0.13–0.90)

3 (5.2)

10 (17.5)

3.81 (0.92–15.71)

GSTP1 Ile105Val

(rs1695 A313G)

AA (Ile/Ile)

38 (43.7)

72 (55.8)

0.14

1.00

32 (66.7)

30 (53.6)

0.35

1.00

AG (Ile/Val)

42 (48.3)

45 (34.9)

0.57 (0.32–1.01)

14 (29.2)

24 (42.9)

1.83 (0.80–4.18)

GG (Val/Val)

7 (8.0)

12 (9.3)

1.11 (0.40–3.04)

2 (4.2)

2 (3.6)

0.94 (0.12–7.08)

GSTP1 Ala114Val

(rs1138272 C341T)

CC (Ala/Ala)

69 (79.3)

113 (87.6)

0.009*

1.00

44 (91.7)

50 (89.3)

0.68

1.00

CT (Ala/Val)

18 (20.7)

11 (8.5)

0.37 (0.17–0.84)

4 (8.3)

6 (10.7)

1.32 (0.35–4.98)

TT (Val/Val)

0 (0.0)

5 (3.9)

NA

0 (0.0)

0 (0.0)

NA

GSTP1

*A/*A

38 (43.7)

72 (55.8)

0.04*

1.00

32 (66.7)

30 (53.6)

0.54

1.00

*A/*B

29 (33.3)

36 (27.9)

0.66 (0.35–1.23)

10 (20.8)

18 (32.1)

1.92 (0.77-4:82)

*A/*C

13 (14.9)

9 (7.0)

0.37 (0.14–0.93)

4 (8.3)

6 (10.7)

1.60 (0.41–6.23)

*B/*B

2 (2.3)

5 (3.9)

1.32 (0.24–7.12)

2 (4.2)

2 (3.6)

0.94 (0.12–7.08)

*B/*C

5 (5.7)

2 (1.6)

0.21 (0.04–1.14)

0 (0.0)

0 (0.0)

NA

*C/*C

0 (0.0)

5 (3.9)

NA

0 (0.0)

0 (0.0)

NA