Diurnal Rhythms of Bone Turnover Markers in Three Ethnic Groups.

There was a highly significant correlation between CTX and P1NP for all groups (all P < .001) for both fasting concentrations (R 2 = 0.64, 0.73, and 0.53 for the UK, The Gambia, and China, respectively) and the 24-hour mean (R 2 = 0.71, 0.75, and 0.58 for the UK, The Gambia, and China, respectively).

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There was no significant relationship between PTH and P1NP in either fasting (data not shown) or 24-hour mean values in any of the three groups, although the relationship was approaching significance in British participants ( Figure 4 ).

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