N Kushal Kumar Raju^1*, Keshav Krishnamurthy¹, Bhuvanagiri Prahal Bhagavath², Nathan Shankar², A. M. Janani³, N Avinash², Aditya Ray¹ and P. Mahalakshmi⁴

¹Electronics and Instrumentation Engineering, School of Electrical Engineering, Vellore Institute of Technology, Vellore, Tamil Nadu India.

²Electrical and Electronics Engineering, School of Electrical Engineering, Vellore Institute of Technology, Vellore, Tamil Nadu India.

³Computer Science and Engineering, Sri Sairam Engineering College, Chennai, Tamil Nadu India.

⁴School of Electrical Engineering, Vellore Institute of Technology, Vellore, Tamil Nadu India.

Corresponding Author E-mail: pmahalakshmi@vit.ac.in

DOI : https://dx.doi.org/10.13005/bpj/2944

Abstract

Diabetes is one of the costliest chronic diseases, it is a metabolic disorder in which a patient has excessive blood sugar levels due to the body's inability to create enough insulin, and it can also cause long-term harm to the heart, blood vessels, eyes, kidneys, and nerves. Adults with diabetes are twice as likely as non-diabetics to have a heart attack or stroke. Despite its massive impact on the global population, no kind of diabetes has a cure. Although most medications help patients manage their symptoms to some extent, diabetics nevertheless suffer several long-term health concerns. So, if we are able to predict diabetes early, we could control it and it can be done by using Machine learning techniques. Our work aim is to predict if the patient has diabetes using Machine learning techniques and the ensemble method. We will be using four algorithms which are SVM, KNN, Logistic Regression, and Random Forest classifier and we would also compare all four models to check which model is giving the best accuracy and link our best model to a web app that could predict if the patient has any chances of having diabetes.

Keywords

Ensemble; KNN; Logistic Regression; Machine learning; Random Forest; SVM

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Copy the following to cite this article: Raju N. K. K, Krishnamurthy K, Bhagavath B. P, Shankar N, Janani A. M, Avinash N, Ray A, Mahalakshmi P.Diabetes Prediction Using Machine Learning and Flask. Biomed Pharmacol J 2024;17(2).

Copy the following to cite this URL: Raju N. K. K, Krishnamurthy K, Bhagavath B. P, Shankar N, Janani A. M, Avinash N, Ray A, Mahalakshmi P.Diabetes Prediction Using Machine Learning and Flask. Biomed Pharmacol J 2024;17(2). Available from: https://bit.ly/4bwB37W

Introduction

Diabetes is a condition caused by a rise in blood glucose levels. Diabetes is a chronic condition that has caused a global healthcare catastrophe. Diabetes impacted around 463 million people worldwide in 2019, accounting for approximately 8.8 percent of the total adult population ¹. The healthcare sector is facing hurdles in crucial areas like electronic record management, computer-aided diagnosis, and disease predictions due to the need to lower healthcare costs and the shift to personalized healthcare. To meet these issues, machine learning provides a wide range of tools, methods, and systems. ². According to the statistics of researchers, the occurrences of diabetes in men and women are similar ³. Several experimental studies indicate that occurrences will continue to climb. ¹ Diabetes is a significant chronic condition in children and teenagers as well. Young diabetics are at risk of dying because of the disease’s acute consequences. ⁴ In 2019, diabetes claimed the lives of almost 4.2 million people. It is the seventh leading cause of death in the globe ^5,6. Diabetes-related health expenditures were predicted to cost around $727 billion globally in the year 2017 ¹. In the United States alone, the cost of diabetes in 2017 was close to $327 billion ⁷. The average medical expense for a diabetic is 2.3 times more than for a non-diabetic. ⁸. Diabetes is a serious health concern because of its rising incidence, the rise of its complications as a leading cause of early illness and death, furthermore the tremendous and escalating cost it imposes on healthcare systems ⁹. Serious consequences can include diabetic ketoacidosis, hyperosmolar hyperglycemia, and even death ¹⁰. Severe long-term complications include cardiovascular disease, stroke, chronic renal disease, foot ulcers, nerve damage, vision loss, and cognitive impairment ^4,11. Big Data and the Cloud are two examples of new technologies that are helping to solve healthcare issues ¹². Predictive analytics strives to improve healthcare outcomes by accurately detecting diseases, improving patient care, and maximizing resources. ¹³. The complexity of updating the healthcare industry’s tendency toward processing massive health data and accessing them for analysis and action will increase significantly. Because Big Data in the healthcare business is unstructured, it is necessary to structure and emphasize its magnitude into a nominal value using a realistic solution. ¹⁴. Diabetes has afflicted about 246 million individuals globally, with women accounting for the majority of those affected. According to WHO research, this figure is predicted to climb to more than 380 million by 2025. The illness has been ranked the fifth-deadliest disease in the United States, and there is little hope of treatment in the near future ¹⁵. By 2035, it is anticipated that around 600 million individuals would have diabetes. Diabetes can be diagnosed using a variety of traditional approaches based on physical and chemical testing. However, early prediction of diabetes is a quite challenging task for medical practitioners due to complex interdependence on various factors as diabetes affects human organs such as kidneys, eyes, heart, nerves, foot, etc. Methods of data science have the potential to aid other scientific domains by throwing fresh light on prevalent topics. One such task is to assist in the prediction of medical data. To diagnose Diabetes,   medical professionals require a trustworthy prediction methodology ¹⁶. Employing various supervised learning methods of artificial neural networks, a study was conducted on the prediction of diabetes. Many diabetics between the ages of 25 to 78 provided data for the network’s training. To verify accurate prediction, the optimal algorithm’s prediction accuracy is computed. ¹⁹. Sugar from the foods we eat comes, and insulin is the hormone that helps the entry of sugar into the cells in order to give energy ²¹. Machine learning is an emerging scientific field in data science dealing with how machines learn from experience. Filter algorithms are broad preprocessing methods that do not rely on a particular categorization method ²⁵. This project aims to develop a system that can perform an early prediction of diabetes for a patient with higher accuracy by combining the results  of different machine learning techniques and integrating them with a web app so that the user can check their chances of having diabetes live.

Materials and Methods

Dataset

The dataset generated was retrieved from Sylhet Diabetes Hospital patients in Sylhet, Bangladesh, and was approved by a doctor ²². Utilizing large information examination one can study immense datasets and track down secret data ²⁸. The dataset contains 520 patients.

Attribute information

Polyuria: Production of abnormally large volumes of dilute urine.

Polydipsia: abnormally great thirst

sudden weight loss: reduction in your overall weight

Weakness: feeling weak and tired

Polyphagia: extreme hunger

Genital thrush: yeast infection caused in private parts

visual blurring: lack of sharpness in your vision or having a blurred vision

Itching: feeling itchiness in your body

Irritability: being annoyed or irritated frequently

delayed healing: the wound has trouble healing or staying closed

partial paresis: feeling like mild paralysis, Unlike paralysis, people with paresis can still move their muscles

muscle stiffness: When your muscles feel tight and you find it more difficult to move than you usually do, especially after rest

Alopecia: having a partial or complete absence of hair from areas of the body where it normally grows

Obesity: if your BMI is above 30 you are considered to be obese

Class: the outcome of the patient, if he is positive or negative for diabetes

Data Preprocessing

The most crucial procedure is data pre-processing. Most healthcare-related data has missing values and other contaminants, which can reduce data effectiveness. Data mining is capable of extracting hidden insights from massive amounts of diabetes-related data²⁷. It employs a number of ways of analyzing massive volumes of data in order to find hidden knowledge³³. It is the rigorous process of identifying instances in massive data sets that includes approaches at the intersection of artificial intelligence, machine learning, insights, and database system ³¹. It is a collection of heuristics and computations used to extract a data mining model from data ¹⁸. Medical data mining is used in knowledge collection and analysis to turn information gathered from research papers, medical reports, flow charts, and evidence tables into meaningful information for decision-making ¹⁷. Data analytics is the act of evaluating and detecting hidden patterns in massive amounts of data in order to derive conclusions ²⁰. Big Data Analytics is important in the healthcare industry. Databases in the healthcare industry are huge in size. Using big data analytics, one may investigate massive datasets to uncover hidden information and trends in order to gain knowledge from the data and forecast results accordingly ²⁹. Data cleaning is the process of detecting and correcting (or removing) corrupt or inaccurate records from a record set, table, or data set, and it refers to distinguishing incomplete, incorrect, inaccurate, or tangential parts of the knowledge by substituting, modifying, or deleting the dirty or coarse data ³² To improve the quality and effectiveness obtained after the mining process and data cleaning, Data preprocessing is done. To use Machine Learning Techniques on the dataset effectively this process is essential for accurate results and successful prediction.

Apply Machine Learning

Data can be categorized based on their characteristics. Classification is accomplished by creating a model based on existing records and sample data. One of the goals of categorization is to improve the consistency of the data-based outcomes ³⁵. When data is ready, Machine Learning Techniques are used. We use different classification and ensemble techniques, to predict diabetes. Manipulation of the input data provided to a single classifier is a typical method for constructing ensembles. This may be accomplished by running the classifier using a training set consisting of a randomly selected sample with a replacement from the original dataset ³⁰. The main objective to apply Machine Learning Techniques is to analyze the performance of these methods and find accuracy of them, and also be able to figure out the responsible/important feature which plays a major role in prediction.

Web Application

Create a web app using Flask and connect it to our model which gave the best accuracy. We will save our best prediction model to a file using a library called Pickle. The model is then packaged into a web service that, when supplied data through a POST request, gives the diabetes prediction probability as a response. We will utilize the Flask web framework for this, which is a popular lightweight framework for constructing web services in Python. First, we’ll utilize the request method to collect data from the user and save it in the appropriate variables. The model will then be used to predict the possibility that an individual is diabetic using ‘predict()’. Then, based on the prediction, we will render the index.html page and display the necessary output.

Figure 1: Flowchart Click here to view Figure

Algorithms Used

KNN- This technique be used for both classification and regression. This algorithm’s principal function is to categorize a new object based on characteristics and training examples³⁴. According to the k training samples, which are the closest nearby neighbors to the test person, this algorithm predicts the test sample’s level and obtains the result with the greatest level possibility²³.

LOGISTIC REGRESSION- Logistic Regression is a classification approach based on the idea of the probability that may be used as a predictive analytic methodology. It is used to solve categorization problems. This technique yields a discrete binary result between 0 and 1²⁴.

SVM- SVM is a supervised machine learning technique that outperforms other machine learning algorithms and has been extensively tested in real-world classification problems and nonlinear function forecasting tasks ³⁶

RANDOM FOREST- For bootstrapping and ensemble composition, random forest is a strategy that can avoid the overfitting problem ²⁶.

Implementation

Figure 2: Checking for null values Click here to view Figure

In Figure 2. We have used isna().sum() which would sum all the null values present in our dataset, since the sum for all is 0 so there are no null values present in our dataset.

Figure 3: Replacing yes and no with 0s and 1s Click here to view Figure

We are replacing all “yes” and “no” to 1s and 0s, positive and negative outcomes with 1s and 0s and male and female with 0s and 1s respectively, to make it easy for our model to do data analysis

Data Preprocessing

Data Visualization and Analysis

Figure 4: Correlation Heat map Click here to view Figure

In Figure 4. We are using the heat map feature in the seaborns library to correlate our attributes. We can see that polyuria, polydipsia, sudden weight loss and gender show higher correlation with Class attribute which shows the outcome or target. So these attributes have higher weightage in terms of turning positive for diabetes.

Figure 5: Age group Data Analysis Click here to view Figure

In Figure 5. Age group analysis is done to check which age group has more chances of diabetes, we can infer that age group 60-70 in the dataset has more chances of having diabetes.

Web App development

Figure 6: Web app Click here to view Figure

Figure 7: Web app user inputs Click here to view Figure

Figure 6 depicts the Web application interface, and Figure 7 depicts the user inputs for all of the attributes that would be entered into our model to predict diabetes.

Results and Discussion

Figure 8: Classification report of all models Click here to view Figure

In Figure 8. Classification report, model test score and confusion matrix are shown for each model. The Classification report and confusion matrix are used to evaluate the performance of all our models, Classification report shows the precision, recall, F1 Score, and support of our trained model. The ratio of genuine positives to the total of true and false positives is defined as precision. The ratio of true positives to the sum of true positives and false negatives is known as recall. The weighted harmonic mean of accuracy and recall is used to get the F1 score. The closer the F1 score number is to 1.0, the higher the model’s projected performance. The number of actual instances of the class in the dataset is referred to as support. It does not differ between models; it just diagnoses the process of performance evaluation. So based on the results obtained, we can see that Random forest algorithm has shown the best performance since its f1-score, precision, and recall is 1.00.

Confusion Matrix:

Figure 9: Confusion matrix Click here to view Figure

In Figure 9. The confusion matrix of all 4 models has been plotted using heatmap and seaborns library to compare the performance of each model. From the above results obtained we can see that False Negative for the random forest is 0.00% which means when a person is not diabetic, it did not show he is diabetic.

Table 1: Comparision of all algorithm results

Algorithm	Accuracy (%)
Logistic Regression	93.27
Support Vector Machine	96.92
K-nearest neighbors	96.92
Random Forest	98.08

 

Table 1 shows the comparison of all our models and the Random Forest model showed the highest accuracy.

Cross validation

Figure 10: Cross-validation Click here to view Figure

In Figure 10. Cross-validation is done for all 4 models to validate our models, to estimate how accurately a predictive model will perform in practice

Web App

Figure 11: Web app result Click here to view Figure

In Figure 11, the result of the patient’s diabetes is shown in the Web application. The cutoff value for the prediction of diabetes is taken as 0.5, so if a patient gets a probability of more than 0.5 then the patient is at risk of having diabetes.

Conclusion

From the above table it can be observed that random forest gives the highest accuracy when trained with the dataset we have and we were also able to connect our model with a web app.

If a person has diabetes but is predicted not to have it (false negative), this is the worst-case situation and might have devastating consequences. This is prevented in our case because the false negative is 0.0% for Random Forest.

So we were able to develop a system that can perform early prediction of diabetes for a patient with higher accuracy by using machine learning technique.

Acknowledgement

None

Conflict of Interest

There is no conflict of interest

Funding Sources

There is no funding Source

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