Table 1.
Association between copy number variants of the GSTM1 and GSTT1 and endometrial cancer risk in the pooled NHS and WHS data
| Cases | Controls | ORa | 95% CI | |
|---|---|---|---|---|
| GSTM1 | ||||
| 0 | 232 | 621 | 1.00 | - |
| 1 | 156 | 442 | 0.96 | 0.74–1.24 |
| 2/3 | 39 | 114 | 0.82 | 0.52–1.27 |
| Ptrend | 0.41 | |||
| carrier | 195 | 556 | 0.93 | 0.73–1.19 |
| GSTT1 | ||||
| 0 | 64 | 239 | 1.00 | - |
| 1 | 199 | 526 | 1.33 | 0.92–1.92 |
| 2/3 | 157 | 401 | 1.51 | 1.04–2.19 |
| Ptrend | 0.04 | |||
| carrier | 356 | 927 | 1.41 | 1.00–1.99 |
| GSTM1/GSTT1 combinations | ||||
| null/null | 36 | 125 | 1.00 | - |
| null/carrier | 193 | 482 | 1.33 | 0.85–2.08 |
| carrier/null | 28 | 108 | 0.83 | 0.46–1.52 |
| carrier/carrier | 161 | 431 | 1.23 | 0.78–1.94 |
Conditional logistic regression adjusted for matching factors and smoking at diagnosis, age at menarche, age at first birth and parity, BMI (kg/m2) at diagnosis, postmenopausal hormone use at diagnosis, menopausal status and age at menopause at diagnosis, ever oral contraceptive use