[36]. Similar results were also reported in a Chinese population that the Framingham score overestimated the risk of coronary artery disease [57]. In addition, a study by Alenazi et al. (2022) found that the Framingham score detected more moderate or higher cardiovascular risk in South Asians; when compared with tools such as the ACC/AHA equation, the SCORE score, and the WHO/ISH score; however, the authors expressed doubts about the accuracy of this result and emphasized the need to develop a specialized risk assessment tool for this population [16]. A study by Rajib et al. (2021) on a group of type 2 diabetic patients in Bangladesh suggested that the Framingham score was more useful than the WHO/ISH or other scores because it estimated the largest number of high and very high risk subjects [64]. In addition, some studies have suggested that the WHO/ISH score underestimates cardiovascular risk. Otgontuya et al. (2013) used this score to study the population of 3 Asian countries, including Cambodia, Malaysia and Mongolia and found that although the score brings many benefits because it is simple and easy to use, it needs to be adjusted for some risk factors to avoid underestimating the cardiovascular risk of an individual, and each country should have its own specialized score [66]. A 2014 study concluded that the WHO/ISH score cannot stratify cardiovascular risk in Malaysians, while the Framingham score can be used in clinical practice to screen high-risk patients [78]. Liew et al. (2011) concluded that if treatment factors such as the use of antihypertensive and lipid-lowering drugs are not taken into account, cardiovascular risk may be underestimated [ 56] . As in our own study, there were some patients with good blood pressure and lipid control, while with advanced age (over 60) and diabetes status, the patient had at least an average risk level according to the Framingham score, but could be at a low risk level using the WHO/ISH scale.
Our study has limitations in that the sample size is small and the study design is cross-sectional, making it difficult to draw conclusions about trends and causal relationships. Estimating cardiovascular risk too high or too low is detrimental because it may miss subjects who need treatment or
causing patients to worry more than their actual condition. Both the Framingham and WHO/ISH scores have their own advantages and limitations when used on patients with type 2 diabetes. Our study cannot conclude which score is more reliable in estimating cardiovascular risk in patients with diabetes in particular and in Vietnamese people in general. Therefore, we recommend using both scores together to avoid overestimation or underestimation of cardiovascular risk. In addition, the results of this study indicate the need to develop a specialized cardiovascular risk estimation tool in the future for Vietnamese people. We recommend that in the future, we continue to conduct research on a larger sample size, and at the same time, conduct prospective studies and follow-up over a long period of time to more accurately assess cardiovascular risk for patients with type 2 diabetes in Vietnam in particular, thereby developing a specific cardiovascular risk assessment tool for Vietnamese people in general.
CONCLUDE
Studying the application of two scales Framingham and WHO/ISH in estimating 10-year cardiovascular risk in 90 type 2 diabetes patients, we came to the following conclusions:
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- The proportion of patients in the low, medium, high and very high risk groups were 7.78%; 22.22%; 24.44%; 45.56% (according to the Framingham scale) and 21.11%; 34.45%; 14.44%; 30.00% (according to the WHO/ISH scale), respectively.
- In the Framingham score, age, gender, HATT, HDL-C and in the WHO/ISH score, age, HATT and cholesterol are the scoring factors that account for a large proportion when assessing cardiovascular risk.

- The Framingham and WHO/ISH scales had poor agreement with kappa index = 0.259; p < 0.001.
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