Although the second and third quartiles (Q2 and Q3) also showed a trend toward reduced risk, the differences were not statistically significant.
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Comparison of different glycemic control indicators on incidence of acute kidney injury and long-term mortality in critically ill patients with atherosclerotic cardiovascular disease: A retrospective cohort study.
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The sentences
Compared to the reference group (Q1), both Q3 and Q4 were significantly associated with higher mortality risks (Q3: HR = 1.77, 95% CI: 1.19–2.63, P = 0.005; Q4: HR = 1.55, 95% CI: 1.04–2.31, P = 0.03), whereas Q2 did not reach statistical significance.