From:  Low serum urate levels are not associated with increased mortality risk during urate-lowering treatment in patients with gout

 Variables independently associated with mortality in multivariate Cox proportional hazard survival analysis.

VariableHazard risk95% CILp-value
Age (per year)1.0741.054–1.095< 0.001
Gender (female)2.1551.269–3.6490.004
Higher comorbidity2.1411.345–3.408< 0.001
Tophi (SC)1.5061.051–2.1580.026
sUA at baseline (per mg/dL)1.2161.094–1.351< 0.001
sUA strata (follow-up)
< 3.0 mg/dL0.5230.391–0.7020.004
3.0–5.9 mg/dL0.4120.277–0.612< 0.001
≥ 9.0 mg/dL2.0101.086–3.0700.026
6.0–8.9 mg/dL1.0

CIL: confidence interval limits; SC: subcutaneous; sUA: serum urate; ULT: urate-lowering therapy.