Table 2: Salivary nitric oxide levels (μmol/L) in hemodialysis and control groups.

Before Hemodialysis After Hemodialysis Control P value a P value b P value c
No. 30 30 30 < 0.001 < 0.001 < 0.001
Mean(μmol/L) 584.31 281.62 44.45
SD 510.7 340.78 26.89
Minimum(μmol/L) 33.30 31.40 10.60
Maximum(μmol/L) 1407 1321 128.30
First quartile 135.60 41.70 28.50
Median 419.50 114.50 38.20
Third quartile 1066 432.10 42.5

a Comparison between control and pre-hemodialysis (Mann-Whitney U test)
b Comparison between control and post-hemodialysis (Mann-Whitney U test)
c Comparison between pre- and post-hemodialysis