Standardized percent density and absolute density are adjusted for age at examination and BMI
Percent density | Absolute density | ||||||||
---|---|---|---|---|---|---|---|---|---|
Threshold | Volumetric | Threshold, cm2 | Volumetric, cm3 | ||||||
β | 95% CI | β | 95% CI | β | 95% CI | β | 95% CI | ||
Age at examinationa | Per year | −0.056 | −0.077 to −0.036 | −0.060 | −0.082 to −0.038 | −0.049 | −0.071 to −0.026 | −0.005 | −0.027 to 0.017 |
BMIb | Per 2-kg/m2 increase | −0.206 | −0.241 to −0.170 | −0.144 | −0.182 to −0.105 | −0.137 | −0.176 to −0.097 | 0.191 | 0.153 to 0.230 |
Nulliparous | Yes | 0.137 | −0.072 to 0.346 | 0.260 | 0.038 to 0.482 | 0.118 | −0.112 to 0.348 | 0.073 | −0.152 to 0.297 |
Postmenopausal | Yes | −0.201 | −0.389 to −0.012 | −0.133 | −0.334 to 0.069 | −0.223 | −0.430 to −0.016 | −0.043 | −0.246 to 0.160 |
Age at menarche | Per year | 0.045 | −0.012 to 0.102 | 0.013 | −0.049 to 0.075 | 0.044 | −0.018 to 0.107 | −0.008 | −0.070 to 0.054 |
Age at menopause | Per year | 0.016 | −0.008 to 0.041 | 0.015 | −0.010 to 0.040 | 0.024 | 0.000 to 0.048 | 0.029 | 0.005 to 0.053 |
Age at first delivery | Per 2 year | 0.045 | 0.004 to 0.086 | 0.052 | 0.009 to 0.096 | 0.050 | 0.005 to 0.094 | 0.033 | −0.011 to 0.078 |
Ever HT use | Yes | 0.134 | −0.061 to 0.329 | 0.193 | −0.016 to 0.402 | 0.186 | −0.029 to 0.400 | 0.215 | 0.006 to 0.424 |
Ever pill use | Yes | −0.095 | −0.362 to 0.172 | −0.221 | −0.507 to 0.064 | −0.106 | −0.073 to 0.028 | −0.068 | −0.355 to 0.220 |
Family history | Yes | 0.101 | −0.132 to 0.335 | 0.077 | −0.172 to 0.327 | 0.111 | −0.146 to 0.367 | 0.052 | −0.198 to 0.302 |