Mean ranked coefficients of variation (<i>CV</i>) for citrate (Cit), chloride (Cl), potassium (K), magnesium (Mg) and phosphorus (P) in 4097 females (F) and 4014 males (M) in an approximate ‘menarche-menstrual’ (MM) period (ages 16–45) and in 1715 females and 3479 males in an approximate ‘postmenopausal’ group (PM) (ages 56–80).

<p>Significance of differences in <i>CV</i> by trait and age group (MM <i>vs</i>. PM) indicated as <i>P</i><0.05*, <i>P</i><0.01**.