Pre-op

6 mo-post

2 yr-post

P

K⁺

3.98 ± 0.35

4.08 ± 0.42

4.01 ± 0.35

0.831

Na⁺

140.6 ± 2.98

142.1 ± 3.31

142.1 ± 2.80

0.456

Cl⁻

102.30 ± 2.83

103.3 ± 3.40

103.9 ± 5.52

0.680

Ca²⁺

2.17 ± 0.09

2.29 ± 0.10

2.26 ± 0.13

0.075