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SAGE Score in Normotensive and Pre-Hypertensive Patients: A Proof of Concept
Rayne Ramos Fagundes Rigonatto1,2, Priscila Valverde Oliveira Vitorino1,2,3, Adriana Camargo Oliveira1
1Universidade Federal de Goiás - Programa de Pós-graduação em Ciências da Saúde, Goiânia, GO - Brasil.
Insights
The SAGE score effectively identifies individuals at risk for increased pulse wave velocity (PWV), even in non-hypertensive and pre-hypertensive groups. Further refinement is needed for a specific score tailored to these populations.
Area of Science:
- Cardiovascular Physiology
- Biomedical Engineering
- Clinical Diagnostics
Background:
- The SAGE score was initially developed to identify individuals at risk for elevated pulse wave velocity (PWV).
- Previous research primarily focused on the application of the SAGE score within hypertensive patient populations.
Purpose of the Study:
- To evaluate the SAGE score's efficacy in detecting increased PWV among non-hypertensive and pre-hypertensive individuals.
- To assess the score's ability to identify early signs of arterial stiffness in at-risk, non-hypertensive populations.
Main Methods:
- A retrospective cross-sectional study analyzed central blood pressure data and calculated SAGE scores in 100 normotensive and pre-hypertensive subjects.
- Sensitivity, specificity, and predictive values were determined for various PWV cut-off points (≥10 m/s, ≥9.08 m/s, ≥7.30 m/s).
- Statistical significance was set at p<0.05.
Main Results:
- The SAGE score demonstrated strong correlations with age (r=0.938), glycemia (r=0.366), and glomerular filtration rate (r=-0.658).
- Areas under the ROC curve were high across all PWV cut-offs (0.967-0.977), indicating excellent diagnostic performance.
- Optimal cut-off points were identified: score 7 for PWV ≥10 m/s (95.40% specificity, 100% sensitivity), score 5 for PWV ≥9.08 m/s (96.00% sensitivity, 94.70% specificity), and score 2 for PWV ≥7.30 m/s.
Conclusions:
- The SAGE score effectively identifies individuals at increased risk of arterial stiffness across different PWV thresholds.
- The findings suggest the SAGE score's potential utility in non-hypertensive and pre-hypertensive individuals.
- Development of a SAGE score specifically for normotensive and pre-hypertensive subjects is warranted.
Background:
The SAGE score was developed to detect individuals at risk for increased pulse wave velocity (PWV). So far, studies have been focused on hypertensive patients.
Objective:
To assess the ability of the score to detect non-hypertensive and pre-hypertensive patients at risk for increased PWV.
Methods:
Retrospective cross-sectional study of analysis of central blood pressure data and calculation of the SAGE score of non-hypertensive and pre-hypertensive patients. Each score point was analyzed for sensitivity, specificity, positive and negative predictive values, using the cut-off point for positive diagnosis a PVW ≥ 10m/s, ≥9.08 m/s (75thpercentile) and ≥7.30 m/s (50thpercentile). A p<0.05 was considered statistically significant.
Results:
The sample was composed of 100 normotensive and pre-hypertensive individuals, with mean age of 52.64 ± 14.94 years and median PWV of 7.30 m/s (6.03 - 9.08). The SAGE score was correlated with age (r=0.938, p<0.001), glycemia (r=0.366, p<0.001) and glomerular filtration rate (r=-0.658, p<0.001). The area under the ROC curve was 0.968 (p<0.001) for PWV ≥ 10 m/s, 0.977 (p<0.001) for PWV ≥ 9.08 m/s and 0.967 (p<0.001) for PWV ≥ 7.30 m/s. The score 7 showed a specificity of 95.40% and sensitivity of 100% for PWV≥10 m/s. The cut-off point would be of five for a PWV≥9.08 m/s (sensitivity =96.00%, specificity = 94.70%), and two for a PWV ≥ 7.30 m/s.
Conclusion:
The SAGE score could identify individuals at higher risk of arterial stiffness, using different PWV cutoff points. However, the development of a specific score for normotensive and pre-hypertensive subjects is needed.
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