Differences in urine NTX between patients and controls, without and with adjustment for possible confounders.

β: unstandardized β coefficient, CI: β confidence interval. NTX (cross-linked N-terminal telopeptide of type 1 collagen) was analyzed as dependent and the following as independent variables (separately and simultaneously): recent childbirth, breastfeeding, systemic glucocorticoids, current smoking, alcohol use, began menopausal transition, sun tanning in northern latitudes, and phosphate. Recent childbirth and breastfeeding were not included simultaneously in the regression analysis due to their high correlation (r = 0.921; p