| Albahli, S. (27) | 2020 | 253, 395 | FBS, HbA1c, gamma-GTP, BMI, TG, age, uric acid, sex, physical activity, drinking, smoking, and family history | ML | K-mean clustering + LR | Unmentioned | Unmentioned | 0.9753 |
| Eyasu, K. et al. (28) | 2020 | 12 | Unmentioned | NLP (Data mining) | J48 | 0.95 | Unmentioned | 0.9515 |
| PART | 0.944 | Unmentioned | 0.9451 |
| JRip | 0.947 | Unmentioned | 0.9473 |
| Islam, M. et al. (29) | 2020 | 1570 | Type of place, electricity, wealth index, age, education, working status, smoking, arm circumference, taking medicine, weight, and BMI | ML | SVM | Unmentioned | 0.662 | 0.929 |
| RF | Unmentioned | 0.593 | 0.923 |
| Linear discriminant analysis | Unmentioned | 0.66 | 0.926 |
| LR | Unmentioned | 0.682 | 0.925 |
| NN | Unmentioned | 0.68 | 0.928 |
| Bagged classification and regression tree (Bagged CART) | Unmentioned | 0.6 | 0.943 |
| Kopitar, L. et al. (30) | 2020 | 3723 | A set of 58 variables that were not mentioned specifically. Generally, it includes an INDRISC (FR) questionnaire, physical activity (at least 30 min during the day), fruit and vegetable consumption, a history of antihypertensive drug treatment, a history of high blood glucose levels, and a family history of diabetes. | ML | Linear regression | Unmentioned | 0.854 | Unmentioned |
| Regularised generalised linear model (Glmnet) | Unmentioned | 0.859 | Unmentioned |
| RF | Unmentioned | 0.852 | Unmentioned |
| eXtreme gradient boosting (XGBoost) | Unmentioned | 0.844 | Unmentioned |
| Light gradient boosting machine (lightGBM) | Unmentioned | 0.847 | Unmentioned |
| Li, Y. et al. (31) | 2020 | 147 | Unmentioned | ML | SVM | Unmentioned | Unmentioned | 0.9722 |
| Liu, Y. (32) | 2020 | 650 groups | FBS, 2-hpp, clinical symptoms: Thirst, dry mouth, excessive drinking, polyphagia, polyuria, weight loss, family history, smoking and drinking | ML | MATLAB Neural Network | Unmentioned | Unmentioned | 0.92 |
| Al Masud, F. et al. (33) | 2021 | 306 | Age, area of residence, standard growth rate, HbA1c, hypoglycemia, adequate nutrition, autoantibodies, sex, and family history of type 1 and 2 diabetes | ML | Ranker analysis, data mining | Unmentioned | Unmentioned | Unmentioned |
| Deepa, S.N and Banerjee, Abhik (34) | 2021 | 900 | Images of the tongue | ML | CNN + SVM | 0.9831 | Unmentioned | 0.9782 |
| Dietz, B. et al. (35) | 2021 | 2371 | T1-weighted whole-body MRI, sex, age, BMI, insulin sensitivity, and HbA1c | DL | Dense CNN | Unmentioned | 0.87 | Unmentioned |
| Islam, M. et al. (36) | 2021 | 492 | Retinal images | DL | CNN | Unmentioned | 0.662 | Unmentioned |
| Lee, W.S. et al. (37) | 2021 | 1000 | Synthetic glucose profiles | ML | Shallow neural network | Unmentioned | Unmentioned | 0.873 |
| DL | Multilayer perceptron (MLP) | Unmentioned | Unmentioned | 0.9 |
| CNN | Unmentioned | Unmentioned | 0.865 |
| RNN | Unmentioned | Unmentioned | 0.0866 |
| Samreen, S. (38) | 2021 | 520 | Age, sex, polyuria, polydipsia, sudden weight loss, weakness, polyphagia, genital thrush, visual blurring, itching, irritability, delayed healing, partial paresis, muscle stiffness, alopecia, and obesity | ML | NB | Unmentioned | 0.95 | 0.8961 |
| KNN | Unmentioned | 0.98 | 0.9487 |
| LR | Unmentioned | 0.97 | 0.9269 |
| SVM | Unmentioned | 0.99 | 0.9833 |
| DT | Unmentioned | 0.96 | 0.9685 |
| RF | Unmentioned | 0.99 | 0.9833 |
| Adaboost(AB) | Unmentioned | 0.98 | 0.9641 |
| Gradient boost (GB) | Unmentioned | 0.99 | 0.9717 |
| Srivastava A.K, et al. (39) | 2021 | Unmentioned. Pima Indian diabetes dataset | Unmentioned | ML | DNN | 0.8931 | 0.9236 | 0.9474 |
| Xiang, Y. et al. (40) | 2021 | 165 | Fundus images, tongue appearance, and pulse characteristics | ML | RF | 0.76 | Unmentioned | 0.85 |
| Zhang,k. et al. (41) | 2021 | 57672 cases and 115344 retinal images | Fundus images, age, sex, height, weight, BMI, and blood pressure | DL | RF | Unmentioned | Unmentioned | 0.93 |
| ML | CNN | Unmentioned | Unmentioned | 0.861 |
| Alshari, H. and Odabas, A. (42) | 2022 | 14682 | Physical activity, dietary, smoking features, alcohol consumption, hypertension, age, gender, race, marital status, education level, annual family income, and the ratio of family income to poverty guidelines | ML | XGBoost | 0.748 | 0.842 | 0.846 |
| LightGBM | 0.749 | 0.843 | 0.846 |
| CatBoost | 0.737 | 0.836 | 0.836 |
| Neural networks | 0.721 | 0.821 | 0.829 |
| Anaya-Isaza, A. and Zequera-Diaz, M (43) | 2022 | 167 | Foot thermography | DL | CNN | 0.8583 | Unmentioned | 0.8278 |
| Balasubramaniyan, S. et al. (44) | 2022 | 2675 | Tongue images: Tongue shape and color, fissure identification, fur color and fur thickness, tooth markings, and red dot | DL | CNN | 0.99 | Unmentioned | 0.984 |
| Ellouze, A. et al. (45) | 2022 | 768 | Pregnancy, plasma glucose concentration, diastolic blood pressure, triceps skinfold thickness, insulin, mass, pedigree of diabetes, and age | ML | KNN | 0.77 | 0.76 | 0.77 |
| SVM | 0.8 | 0.87 | 0.8 |
| DT | 0.76 | 0.79 | 0.75 |
| DL | RNN | 0.93 | 0.95 | 0.93 |
| CNN | 0.9 | 0.92 | 0.9 |
| Long short-term memory (LSTM) | 0.97 | 0.99 | 0.97 |
| Long short-term memory (LSTM) | 0.95 | 0.97 | 0.95 |
| Fufurin, I. et al. (46) | 2022 | 1200 infrared exhaled breath spectra from 120 volunteers | Exhaled breath samples and using IR breath spectra | DL | CNN | Unmentioned | 0.99 | 0.997 |
| Hossain, E. et al. (47) | 2022 | Unmentioned | Number of pregnancies, BMI, insulin levels, age, glucose, skin fold thickness, blood pressure, and diabetes pedigree function | ML | KNN & LightGBM | 0.84 | 0.936 | 0.891 |
| Rabie, O. et al. (48) | 2022 | 829 | Age, BMI, glucose, the number of pregnancies, blood pressure, skin foldthickness, two-hour insulin, and pedigree diabetes function | DL | DNN | 0.92 | Unmentioned | 0.9307 |
| Ullah, Z. et al. (49) | 2022 | 253680 | Comprised a total of 22 features: Blood pressure, high cholesterol, BMI, smoking, Stroke, heart diseases, fruits, veggies, heavy alcohol consumption, any health care, sex, age, etc. | ML | Nearest neighbor (SMOTE-ENN) | 0.98 | 0.98 | 0.9838 |
| Zee, B. et al. (50) | 2022 | 2221 | Retinal imaging with a non-mydriatic fundus camera | ML | SVM | Unmentioned | 0.993 | Unmentioned |
| Garcia-Dominguez, A et al. (51) | 2023 | 1019 | Diastolic blood pressure, systolic blood pressure, glucose, height, LDL, waist circumference, TG, education, insulin, gender, cholesterol, and age | ML | Neural network | 0.86 | 0.934 | 0.86 |
| Iparraguirre-Villanueva, O.et al. (52) | 2023 | 768 | Number of pregnancies, glucose level, diastolic blood pressure, thickness of skin folds, insulin levels, BMI, genetic history of diabetes, and age | ML | Nearest neighbor(NN) | Unmentioned | 0.667 | 0.753 |
| Naïve Bayes(NB) | Unmentioned | 0.677 | 0.461 |
| Decision tree(DT) | Unmentioned | 0.602 | 0.708 |
| LR | Unmentioned | 0.555 | 0.698 |
| SVM | Unmentioned | 0.56 | 0.67 |
| Salem Alzboon, M. et al. (53) | 2023 | 768 | Data set of 8 demographics and clinical details: Age, gender, number of pregnancie, BMI, blood pressure, skin thickness, insulin level, and glucose concentration | ML | LR | 0.613 | 0.828 | Unmentioned |
| DT | 0.567 | 0.665 | Unmentioned |
| RF | 0.576 | 0.811 | Unmentioned |
| KNN | 0.56 | 0.776 | Unmentioned |
| NB | 0.64 | 0.808 | Unmentioned |
| SVM | 0.583 | 0.822 | Unmentioned |
| GB | 0.528 | 0.636 | Unmentioned |
| Neural network | 0.61 | 0.825 | Unmentioned |
| Deepa,K. and Ranjeeth Kumar, C .(54) | 2023 | Unmentioned | Unmentioned | ML | DT | Unmentioned | Unmentioned | 0.77 |
| KNN | Unmentioned | Unmentioned | 0.773 |
| LR | Unmentioned | Unmentioned | 0.793 |
| Ensemble method | Unmentioned | Unmentioned | 0.806 |
| Duc, L. et al. (55) | 2023 | Unmentioned | Unmentioned | ML | SVM + ANN | Unmentioned | 0.96 | 0.938 |
| Nguyen et al. (56) | 2023 | 2153 | Gender, age, MI, waist circumference, hip circumference, systolic blood pressure, diastolic blood pressure, FBS, 2-hPP, total cholesterol, TG, HDL and insulin | ML | RF | 0.94 | 0.94 | 0.85 |
| Nilashi, M. et al. (57) | 2023 | 768 | Number of pregnancy, 2-hPP, diastolic blood pressure, triceps skin fold thickness, 2 hours serum insulin, BMI, diabetes pedigree function, and age | DL | DBN | Unmentioned | Unmentioned | 0.9832 |
| Önal et al. (58) | 2023 | 68 | Full irtis images, the iris segmentation from raw images, the segmentation of the pancreatic region in the iridology chart | DL | CNN | 0.8333 | Unmentioned | 0.8 |
| Shaukat, Z.et al. (59) | 2023 | 768 | Number of pregnancies, plasma glucose concentration,diastolic blood pressure,triceps skinfold thickness,2-hour serum insulin,BMI,diabetes pedigree function, and age | ML | DT | 0.72 | 0.839 | 0.7186 |
| KNN | 0.72 | 0.697 | 0.723 |
| RF | 0.78 | 0.832 | 0.7879 |
| LR | Unmentioned | 0.848 | 0.7966 |
| SVM | 0.79 | 0.723 | 0.7922 |
| Zhang, J. et al. (60) | 2023 | 820 | A set of nine clinical feature: Admission glucose, BMI > 28, cardiovascular disease, age, NAFLD, ALT, HDL-C < 1.03, UA, and smoking | ML | LR | 0.357 | 0.819 | Unmentioned |