Variable | Model 1^{b} | Model 2^{b} | Model 3^{b} | ||||||
---|---|---|---|---|---|---|---|---|---|
β (ng/ml) | P | β (ng/ml) | P | β (ng/ml) | P | ||||
Visit age, per yr | −0.0579 | 0.0013 | −0.0521 | 0.0024 | −0.0433 | 0.012 | |||
Black race | 0.0764 | 0.44 | 0.2059 | 0.028 | 0.0493 | 0.62 | |||
Year 2 BMI, per 1 kg/m^{2} | −0.1091 | <0.0001 | 0.0119 | 0.65 | |||||
Δ BMI, per 1 kg/m^{2} | −0.1766 | <0.0001 | −0.1087 | <0.0001 | |||||
Year 2 waist circumference, per 1 cm | −0.0544 | <0.0001 | |||||||
Δ waist circumference, per 1 cm | −0.0278 | 0.0006 |
^{a} Mean change in total testosterone corresponding to the indicated difference in the independent variable.
^{b} Each of the models also included terms for secular changes in hormone levels between the Years 2 and 7, and the Years 2 and 10 examinations.