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Table 3 Association between GSTM1 and GSTT1 polymorphisms and cataract risk

From: Is there association between Glutathione S Transferases polymorphisms and cataract risk: a meta-analysis?

Groups

Numbera

Statistical methodb

OR (95 % CI)

P

All

    

GSTM1 null + GSTT1 positive

7

Random (P < 0.001)

0.83 (0.56– 1.23)

0.356

GSTM1 positive + GSTT1 null

7

Fixed (P = 0.240)

1.20 (0.95– 1.53)

0.134

GSTM1 null + GSTT1 null

7

Random (P = 0.010)

1.16 (0.71– 1.89)

0.545

Ethnics

    

Caucasian

    

GSTM1 null + GSTT1 positive

6

Random (P < 0.001)

0.85 (0.52– 1.37)

0.494

GSTM1 positive + GSTT1 null

6

Fixed (P = 0.658)

1.00 (0.74– 1.34)

0.983

GSTM1 null + GSTT1 null

6

Random (P = 0.008)

1.27 (0.67– 2.38)

0.466

Study design

    

PB

    

GSTM1 null + GSTT1 positive

2

Fixed (P = 0.591)

0.71 (0.54– 0.92)

0.009

GSTM1 positive + GSTT1 null

2

Fixed (P = 0.334)

1.03 (0.69– 1.53)

0.899

GSTM1 null + GSTT1 null

2

Random (P = 0.036)

0.87 (0.34– 2.18)

0.760

HB

    

GSTM1 null + GSTT1 positive

5

Random (P < 0.001)

0.88 (0.47– 1.65)

0.697

GSTM1 positive + GSTT1 null

5

Fixed (P = 0.196)

1.32 (0.97– 1.79)

0.073

GSTM1 null + GSTT1 null

5

Random (P = 0.024)

1.38 (0.71– 2.69)

0.336

Gender

    

Male

    

GSTM1 null + GSTT1 positive

2

Fixed (P = 0.990)

0.88 (0.49– 1.59)

0.676

GSTM1 positive + GSTT1 null

2

Fixed (P = 0.476)

0.84 (0.28– 2.50)

0.749

GSTM1 null + GSTT1 null

2

Fixed (P = 0.672)

1.48 (0.52– 4.21)

0.463

Female

    

GSTM1 null + GSTT1 positive

2

Random (P < 0.001)

0.79 (0.06– 10.87)

0.858

GSTM1 positive + GSTT1 null

2

Fixed (P = 0.767)

0.62 (0.27– 1.43)

0.264

GSTM1 null + GSTT1 null

2

Random (P = 0.074)

0.91 (0.15– 5.57)

0.919

Cataract type

    

Cortical

    

GSTM1 null + GSTT1 positive

3

Fixed (P = 0.745)

0.82 (0.62– 1.10)

0.181

GSTM1 positive + GSTT1 null

3

Fixed (P = 0.131)

1.39 (0.99– 1.96)

0.061

GSTM1 null + GSTT1 null

3

Fixed (P = 0.171)

1.03 (0.72– 1.48)

0.855

Nuclear

    

GSTM1 null + GSTT1 positive

2

Random (P = 0.030)

1.00 (0.39– 2.56)

0.994

GSTM1 positive + GSTT1 null

2

Random (P = 0.081)

0.67 (0.11– 4.24)

0.668

GSTM1 null + GSTT1 null

2

Fixed (P = 0.868)

1.16 (0.56– 2.38)

0.694

Posterior subcapsular

    

GSTM1 null + GSTT1 positive

2

Random (P = 0.038)

1.20 (0.42– 3.39)

0.734

GSTM1 positive + GSTT1 null

2

Fixed (P = 0.157)

1.15 (0.59– 2.26)

0.682

GSTM1 null + GSTT1 null

2

Fixed (P = 0.399)

1.97 (0.98– 3.97)

0.059

Mixed

    

GSTM1 null + GSTT1 positive

2

Random (P = 0.019)

0.81 (0.25– 2.61)

0.724

GSTM1 positive + GSTT1 null

2

Fixed (P = 0.130)

1.22 (0.68– 2.21)

0.505

GSTM1 null + GSTT1 null

2

Fixed (P = 0.523)

1.44 (0.74– 2.79)

0.279

  1. aN: The number of included studies
  2. bA random-effects or fixed-effects model was used in presence (P ≤ 0.10) or absence (P > 0.10) of heterogeneity of included studies and the P value was presented in parenthesis