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char = t;code = 116
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char = e;code = 101
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char = M;code = 77
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char = ;code = 32
char = (;code = 40
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char = S;code = 83
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char = M;code = 77
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char = );code = 41
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char = t;code = 116
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char = c;code = 99
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char = n;code = 110
char = c;code = 99
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char = r;code = 114
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char = r;code = 114
char = i;code = 105
char = s;code = 115
char = k;code = 107
char = .;code = 46
result sql = A meta-analysis of 20 case-control studies of the glutathione S-transferase M1 (GSTM1) status and colorectal cancer risk.
A meta-analysis of 20 case-control studies of the glutathione S-transferase M1 (GSTM1) status and colorectal cancer risk.
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char = l;code = 108
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char = <;code = 60
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char = S;code = 83
char = U;code = 85
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char = S;code = 83
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char = h;code = 104
char = e;code = 101
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char = c;code = 99
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char = a;code = 97
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char = a;code = 97
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char = t;code = 116
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char = ;code = 32
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char = e;code = 101
char = ;code = 32
char = G;code = 71
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char = M;code = 77
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char = d;code = 100
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char = e;code = 101
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char = 9;code = 57
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char = (;code = 40
char = 9;code = 57
char = 5;code = 53
char = %;code = 37
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char = I;code = 73
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char = I;code = 73
char = f;code = 102
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char = o;code = 111
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char = i;code = 105
char = n;code = 110
char = g;code = 103
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char = d;code = 100
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char = s;code = 115
char = ;code = 32
char = w;code = 119
char = e;code = 101
char = r;code = 114
char = e;code = 101
char = ;code = 32
char = b;code = 98
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char = s;code = 115
char = e;code = 101
char = d;code = 100
char = ;code = 32
char = o;code = 111
char = n;code = 110
char = ;code = 32
char = t;code = 116
char = h;code = 104
char = e;code = 101
char = ;code = 32
char = g;code = 103
char = e;code = 101
char = n;code = 110
char = o;code = 111
char = t;code = 116
char = y;code = 121
char = p;code = 112
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char = n;code = 110
char = g;code = 103
char = ;code = 32
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char = e;code = 101
char = t;code = 116
char = h;code = 104
char = o;code = 111
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char = ;code = 32
char = t;code = 116
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char = l;code = 108
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char = o;code = 111
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char = a;code = 97
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char = s;code = 115
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char = s;code = 115
char = s;code = 115
char = o;code = 111
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char = a;code = 97
char = t;code = 116
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char = ;code = 32
char = t;code = 116
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char = G;code = 71
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char = c;code = 99
char = y;code = 121
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char = o;code = 111
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char = i;code = 105
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char = S;code = 83
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char = ;code = 32
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char = e;code = 101
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char = c;code = 99
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char = d;code = 100
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char = ;code = 32
char = r;code = 114
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char = s;code = 115
char = k;code = 107
char = ;code = 32
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char = a;code = 97
char = s;code = 115
char = ;code = 32
char = a;code = 97
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char = ;code = 32
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char = u;code = 117
char = c;code = 99
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char = e;code = 101
char = d;code = 100
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char = o;code = 111
char = n;code = 110
char = ;code = 32
char = t;code = 116
char = h;code = 104
char = e;code = 101
char = ;code = 32
char = s;code = 115
char = p;code = 112
char = e;code = 101
char = c;code = 99
char = i;code = 105
char = f;code = 102
char = i;code = 105
char = c;code = 99
char = ;code = 32
char = e;code = 101
char = t;code = 116
char = h;code = 104
char = n;code = 110
char = i;code = 105
char = c;code = 99
char = ;code = 32
char = g;code = 103
char = r;code = 114
char = o;code = 111
char = u;code = 117
char = p;code = 112
char = s;code = 115
char = ;code = 32
char = a;code = 97
char = n;code = 110
char = d;code = 100
char = ;code = 32
char = t;code = 116
char = u;code = 117
char = m;code = 109
char = o;code = 111
char = u;code = 117
char = r;code = 114
char = ;code = 32
char = s;code = 115
char = i;code = 105
char = t;code = 116
char = e;code = 101
char = .;code = 46
char = <;code = 60
char = b;code = 98
char = r;code = 114
char = /;code = 47
char = >;code = 62
char = <;code = 60
char = b;code = 98
char = r;code = 114
char = /;code = 47
char = >;code = 62
char = <;code = 60
char = b;code = 98
char = >;code = 62
char = C;code = 67
char = O;code = 79
char = N;code = 78
char = C;code = 67
char = L;code = 76
char = U;code = 85
char = S;code = 83
char = I;code = 73
char = O;code = 79
char = N;code = 78
char = S;code = 83
char = ;code = 32
char = :;code = 58
char = ;code = 32
char = <;code = 60
char = /;code = 47
char = b;code = 98
char = >;code = 62
char = T;code = 84
char = h;code = 104
char = e;code = 101
char = ;code = 32
char = r;code = 114
char = e;code = 101
char = s;code = 115
char = u;code = 117
char = l;code = 108
char = t;code = 116
char = s;code = 115
char = ;code = 32
char = o;code = 111
char = f;code = 102
char = ;code = 32
char = o;code = 111
char = u;code = 117
char = r;code = 114
char = ;code = 32
char = m;code = 109
char = e;code = 101
char = t;code = 116
char = a;code = 97
char = -;code = 45
char = a;code = 97
char = n;code = 110
char = a;code = 97
char = l;code = 108
char = y;code = 121
char = s;code = 115
char = i;code = 105
char = s;code = 115
char = ;code = 32
char = d;code = 100
char = o;code = 111
char = e;code = 101
char = s;code = 115
char = ;code = 32
char = n;code = 110
char = o;code = 111
char = t;code = 116
char = ;code = 32
char = s;code = 115
char = u;code = 117
char = p;code = 112
char = p;code = 112
char = o;code = 111
char = r;code = 114
char = t;code = 116
char = ;code = 32
char = t;code = 116
char = h;code = 104
char = e;code = 101
char = ;code = 32
char = h;code = 104
char = y;code = 121
char = p;code = 112
char = o;code = 111
char = t;code = 116
char = h;code = 104
char = e;code = 101
char = s;code = 115
char = i;code = 105
char = s;code = 115
char = ;code = 32
char = t;code = 116
char = h;code = 104
char = a;code = 97
char = t;code = 116
char = ;code = 32
char = G;code = 71
char = S;code = 83
char = T;code = 84
char = M;code = 77
char = 1;code = 49
char = ;code = 32
char = a;code = 97
char = l;code = 108
char = o;code = 111
char = n;code = 110
char = e;code = 101
char = ;code = 32
char = i;code = 105
char = s;code = 115
char = ;code = 32
char = a;code = 97
char = n;code = 110
char = ;code = 32
char = i;code = 105
char = m;code = 109
char = p;code = 112
char = o;code = 111
char = r;code = 114
char = t;code = 116
char = a;code = 97
char = n;code = 110
char = t;code = 116
char = ;code = 32
char = r;code = 114
char = i;code = 105
char = s;code = 115
char = k;code = 107
char = ;code = 32
char = f;code = 102
char = a;code = 97
char = c;code = 99
char = t;code = 116
char = o;code = 111
char = r;code = 114
char = ;code = 32
char = f;code = 102
char = o;code = 111
char = r;code = 114
char = ;code = 32
char = c;code = 99
char = o;code = 111
char = l;code = 108
char = o;code = 111
char = n;code = 110
char = ;code = 32
char = c;code = 99
char = a;code = 97
char = n;code = 110
char = c;code = 99
char = e;code = 101
char = r;code = 114
char = ,;code = 44
char = ;code = 32
char = a;code = 97
char = n;code = 110
char = d;code = 100
char = ;code = 32
char = s;code = 115
char = u;code = 117
char = g;code = 103
char = g;code = 103
char = e;code = 101
char = s;code = 115
char = t;code = 116
char = s;code = 115
char = ;code = 32
char = t;code = 116
char = h;code = 104
char = a;code = 97
char = t;code = 116
char = ;code = 32
char = G;code = 71
char = S;code = 83
char = T;code = 84
char = M;code = 77
char = 1;code = 49
char = ;code = 32
char = s;code = 115
char = t;code = 116
char = a;code = 97
char = t;code = 116
char = u;code = 117
char = s;code = 115
char = ;code = 32
char = h;code = 104
char = a;code = 97
char = s;code = 115
char = ;code = 32
char = n;code = 110
char = o;code = 111
char = ;code = 32
char = e;code = 101
char = f;code = 102
char = f;code = 102
char = e;code = 101
char = c;code = 99
char = t;code = 116
char = ;code = 32
char = o;code = 111
char = n;code = 110
char = ;code = 32
char = t;code = 116
char = h;code = 104
char = e;code = 101
char = ;code = 32
char = r;code = 114
char = i;code = 105
char = s;code = 115
char = k;code = 107
char = ;code = 32
char = o;code = 111
char = f;code = 102
char = ;code = 32
char = d;code = 100
char = e;code = 101
char = v;code = 118
char = e;code = 101
char = l;code = 108
char = o;code = 111
char = p;code = 112
char = i;code = 105
char = n;code = 110
char = g;code = 103
char = ;code = 32
char = c;code = 99
char = o;code = 111
char = l;code = 108
char = o;code = 111
char = n;code = 110
char = ;code = 32
char = c;code = 99
char = a;code = 97
char = n;code = 110
char = c;code = 99
char = e;code = 101
char = r;code = 114
char = .;code = 46
result sql = BACKGROUND : Glutathione S-transferase M1 is an important phase II enzyme involved in the detoxification of many environmental carcinogens. It has been postulated that individuals with GSTM1 deficiency have increased susceptibility to carcinogens and are more likely to develop cancer. GSTM1 status has been extensively studied as a colon cancer risk factor, although published studies have produced conflicting results. To re-examine this controversy, we have undertaken a meta-analysis investigating the relationship of GSTM1 status and colon cancer risk.

MATERIAL/METHODS : Odds ratio was employed to evaluate the risk of colon cancer and GSTM1 status. To take into account the possibility of heterogeneity across the studies, a statistical test for heterogeneity across the studies was performed. The summary odds ratios were assessed by calculating a weighted average of odds ratios for all of the studies.

RESULTS : The pooled odds ratio of colon cancer risk associated with the GSTM1 deficiency is 0.99 (95% CI: 0.91-1.07). If pooling studies were based on the genotyping method, the overall odds ratio of colon cancer risk associated with the GSTM1 deficiency showed no difference. Moreover, the relationship of GSTM1 deficiency and colon cancer risk was also conducted on the specific ethnic groups and tumour site.

CONCLUSIONS : The results of our meta-analysis does not support the hypothesis that GSTM1 alone is an important risk factor for colon cancer, and suggests that GSTM1 status has no effect on the risk of developing colon cancer.

Publication: Med. Sci. Monit. 2003 Oct ;9(10)::SR83-91.
Publication Date: 2003 Oct
Study Author(s): Ye, Zheng;Parry, James M;
Institution: Data Mining Group, Department of Computing, Imperial College London, UK. [email protected]
Shortcut link to this study:
BACKGROUND : Glutathione S-transferase M1 is an important phase II enzyme involved in the detoxification of many environmental carcinogens. It has been postulated that individuals with GSTM1 deficiency have increased susceptibility to carcinogens and are more likely to develop cancer. GSTM1 status has been extensively studied as a colon cancer risk factor, although published studies have produced conflicting results. To re-examine this controversy, we have undertaken a meta-analysis investigating the relationship of GSTM1 status and colon cancer risk.

MATERIAL/METHODS : Odds ratio was employed to evaluate the risk of colon cancer and GSTM1 status. To take into account the possibility of heterogeneity across the studies, a statistical test for heterogeneity across the studies was performed. The summary odds ratios were assessed by calculating a weighted average of odds ratios for all of the studies.

RESULTS : The pooled odds ratio of colon cancer risk associated with the GSTM1 deficiency is 0.99 (95% CI: 0.91-1.07). If pooling studies were based on the genotyping method, the overall odds ratio of colon cancer risk associated with the GSTM1 deficiency showed no difference. Moreover, the relationship of GSTM1 deficiency and colon cancer risk was also conducted on the specific ethnic groups and tumour site.

CONCLUSIONS : The results of our meta-analysis does not support the hypothesis that GSTM1 alone is an important risk factor for colon cancer, and suggests that GSTM1 status has no effect on the risk of developing colon cancer.
PMID: 14523342

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