Mean weight by cycle, by birth cohort.

<p>Mean weight by cycle, by birth cohort.</p

Mean testosterone by cycle, by birth cohort.

<p>Mean testosterone by cycle, by birth cohort.</p

Cycle 1: Mean testosterone by age, by body mass index.

<p>Cycle 1: Mean testosterone by age, by body mass index.</p

Coefficient and constant for regression of testosterone on age, by year of cycle (n = 991).

<p>Coefficient and constant for regression of testosterone on age, by year of cycle (n = 991).</p

Mixed-effects regression coefficients (ng/dl) and significance levels for T as dependent variable.

<p>Mixed-effects regression coefficients (ng/dl) and significance levels for T as dependent variable.</p

Mean testosterone by cycle, by percent gain/loss of weight in 20 years.

<p>Mean testosterone by cycle, by percent gain/loss of weight in 20 years.</p

Mean testosterone of men ages 51 to 60 years by cycle, by body mass index.

<p>Mean testosterone of men ages 51 to 60 years by cycle, by body mass index.</p

Mean (and Standard Deviation) or Percentage of Relevant Variables by Year of Cycle (n = 991).

<p>Mean (and Standard Deviation) or Percentage of Relevant Variables by Year of Cycle (n = 991).</p

Regression lines for testosterone by age, for six cycles.

<p>Regression lines for testosterone by age, for six cycles.</p

Proportional change in testosterone from cycle 1 to cycle 6, by proportional change in weight.

<p>Proportional change in testosterone from cycle 1 to cycle 6, by proportional change in weight.</p