Table 2.

Comparison of Klotho protein and NO in different groups (x̅ ± s)

group	cases	Klotho (A450 nm)	NO (μmol/L)
A	79	0.303 ± 0.096	43.95 ± 21.85
B	30	0.489 ± 0.216*,Δ	62.63 ± 21.26*,Δ
C	25	0.384 ± 0.136#	44.28 ± 21.74

A = elderly hypertensive group; B = elderly non-hypertensive group; C = non-elderly hypertensive group. Compare with the elderly hypertensive group,

^*p < 0.01;

^#p < 0.05.

And with non-hypertensive group;

^Δp < 0.01.