Table 2 Least-squares mean percentage breast density by genotype
Genotype | All women* mean (n) | Caucasians** mean (n) | African-Americans** mean (n) |
|---|---|---|---|
CYP17 | Â | Â | Â |
   A1/A1 | 34.1 (144) | 33.7 (87) | 34.6 (57) |
   A1/A2 | 34.8 (204) | 34.6 (127) | 35.0 (77) |
   A2/A2 | 37.2 (48) | 39.1 (30) | 34.6 (18) |
P trend | 0.40 | 0.26 | 0.95 |
COMT | Â | Â | Â |
   Val/Val | 33.4 (139) | 34.3 (76) | 32.3 (63) |
   Val/Met | 35.8 (175) | 35.6 (104) | 36.2 (71) |
   Met/Met | 34.9 (82) | 34.2 (64) | 37.7 (18) |
P trend | 0.46 | 0.99 | 0.19 |
17HSDB1 | Â | Â | Â |
   Gly/Gly | 32.4 (109) | 32.0 (71) | 33.3 (38) |
   Gly/Ser | 35.8 (191) | 35.9 (121) | 35.6 (70) |
   Ser/Ser | 35.6 (96) | 36.1 (52) | 34.9 (44) |
P trend | 0.24 | 0.22 | 0.73 |
3HSDB1 | Â | Â | Â |
   Asn/Asn | 35.4 (240) | 37.4 (131) | 32.9 (109) |
   Asn/Thr | 33.6 (126) | 31.5 (88) | 38.4 (38) |
   Thr/Thr | 35.1 (27) | 32.3 (23) | 52.6 (4) |
P trend | 0.58 | 0.04 | 0.02 |