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. 2003 Apr 17;100(9):5119–5123. doi: 10.1073/pnas.0831097100

Table 4.

Additional plasma parameters

50 km
80 km
Before After P Before After P
Bilirubin 0.39  ± 0.05 1.09  ± 0.08 <0.0001 0.51  ± 0.08 1.71  ± 0.24 <0.0005
Creatinine 0.99  ± 0.02 1.2  ± 0.03 <0.0001 1.04  ± 0.03 1.36  ± 0.05 <0.0001
Urea 32  ± 1 51  ± 2 <0.0001 39  ± 2 62  ± 5 <0.001
Glucose 92  ± 3 113  ± 5 <0.0003 86  ± 5 110  ± 5 <0.005

Two-tailed paired t test. Data are given as values ± SE. The difference of [urea] values between the beginning of the 80-km march and the beginning of the 50-km march is significant (P < 0.008).