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. 2017 Jun 1;2017:4737082. doi: 10.1155/2017/4737082

Table 1.

Kinetic parameters of copeptin.

AUC (24 h)
pmol × h/L
C min (1)  
pmol/L
T min (1)  
h
C max (1)  
pmol/L
T max (1)
h
C average  
pmol/L
Fluctuation index
%
Baseline copeptin
pmol/L
All subjects
Mean ± SEM 87.7 ± 7.5 2.3 ± 0.2 5.18 pm ± 1.1 5.9 ± 1.0 4.42 am ± 0.6 h 3.7 ± 0.3 120.5 ± 13.6 5.7 ± 0.7
Median (range) 87.8
(52.2–141.1)
2.2
(1.5–5.2)
6.30 pm
(5.30–12.00 pm)
4.5
(2.4–19.4)
5.00 am
(0.00–7:30 am)
3.7
(2.2–5.9)
113
(72.6–328.5)
4.8
(2.6–12.6)

Subpopulation A: baseline values ≥ median
Mean ± SEM 107.7 ± 8.4 2.8 ± 0.4 7.00 pm ± 0.7 8.7 ± 1.7 5.54 am ± 0.9 4.6 ± 0.4 163.4 ± 33.4 7.7 ± 0.8
Median (range) 93.0
(85.2–141.1)
2.5
(1.6–52)
7:00 pm
(4:00–10.5 pm)
7.4
(3.3–19.4)
6.48 am
(0.00–7.30 am)
3.9
(3.5–5.9)
144.9
(113.8–328.5)
7.3
(4.81–12.6)

Subpopulation B: baseline values < median
Mean ± SEM 67.7 ± 6.4 1.9 ± 0.1 3.48 pm ± 1.8 3.7 ± 0.4 3.30 am ± 0.9 2.8 ± 0.3 92.9 ± 6.1 3.4 ± 0.2
Median (range) 59.9
(52.2–100.0)
1.8
(1.5–3.0)
4.00 pm
(8.30 am–12.00pm)
3.2
(2.4–6.5)
3.00 am
(0.00–7:30 am)
2.5
(2.2–4.2)
88.9
(72.6–113.4)
3.3
(2.6–4.4)

p-value(2) 0.003 0.014 NS 0.043 NS 0.003 0.033 0.033

SEM = standard error of the mean; (1)measured for the period from 7.5 am to 7.5 am (24 hours); (2)comparing the subgroups (e.g., baseline ≥ median versus baseline < median).