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The association between the serum concentrations of club cell protein 16 (CC-16) at baseline and time of blood sampling in minutes after midnight among all participants. The following regression equation was calculated: CC-16 = 7.3 (6.2 to 8.5) −0.004 (−0.006 to −0.003) minutes since midnight. The 95% confidence intervals are shown in brackets. Pearson’s r = −0.41; p < 0.001.
