Table 3 Linear regression of childhood and adult hair product use and mammographic breast density in the New York National Collaborative Perinatal Project (NY-NCPP) and the New York City Multiethnic Breast Cancer Project (NY-MBCP)
From: Hair product use, age at menarche and mammographic breast density in multiethnic urban women
Overalla | NY-NCPPb | NY-MBCPb | |
|---|---|---|---|
β (95% CI) | β (95% CI) | β (95% CI) | |
Percent Density | |||
Childhood use | 0.004 (−0.23, 0.24) | 0.12 (−0.25, 0.49) | −0.08 (−0.38, 0.22) |
Hair oils | −0.04 (−0.28, 0.20) | 0.07 (−0.33, 0.46) | −0.14 (−0.44, 0.16) |
Other Products | 0.07 (−0.23, 0.36) | 0.13 (−0.28, 0.54) | −0.06 (−0.47, 0.35) |
Dense Area | |||
Childhood use | 0.03 (−0.19, 0.26) | 0.15 (−0.21, 0.51) | −0.05 (−0.33, 0.23) |
Hair oils | −0.04 (−0.27, 0.19) | 0.07 (−0.31, 0.45) | −0.13 (−0.41, 0.16) |
Other Products | 0.09 (−0.18, 0.37) | 0.16 (−0.23, 0.55) | −0.02 (−0.41, 0.37) |
β (95% CI) | β (95% CI) | β (95% CI) | |
Percent Density | |||
Adult use | 0.34 (−0.09, 0.77) | 0.44 (−0.07, 0.95) | 0.03 (−0.70, 0.76) |
Hair oils | 0.08 (−0.15, 0.32) | 0.02 (−0.37, 0.41) | 0.03 (−0.27, 0.33) |
Other Products | 0.41 (0.02, 0.79) | 0.49 (−0.001, 0.98) | 0.22 (−0.38, 0.82) |
Dense Area | |||
Adult use | 0.35 (−0.06, 0.76) | 0.45 (−0.05, 0.95) | 0.06 (−0.64, 0.75) |
Hair oils | 0.06 (−0.16, 0.28) | −0.10 (−0.48, 0.27) | 0.08 (−0.20, 0.36) |
Other Products | 0.41 (0.04, 0.78) | 0.55 (0.07, 1.02) | 0.17 (−0.41, 0.74) |