While the continuous αK did not reach statistical significance in adjusted analysis, its squared term was significant (continuous αK HR = 0.45, 95% CI: 0.19, 1.06; P = .07; squared αK HR = 1.32, 95% CI: 1.07, 1.61; P = .009) and the total effect of αK was also significant (Wald test P = .02).
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The relationship between serum α-Klotho with all-cause and cause-specific mortality.
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