| Student features’ categories | Student features values | Studies | No. of studies (percentage of occurrence) |
| Demographic features | Personal information | Gender, age, date of birth, nationality, motivation level, ethnicity, and employment. | [5, 6, 16, 17, 21, 25, 27, 28, 30, 31, 33, 35, 37, 40, 41, 43, 44, 46, 52–57, 59, 60] | 26 (60%) | Family information | Father’s qualification, mother’s qualification, father’s occupation, and mother’s occupation. | [16, 23, 28, 30, 41, 46, 52, 53, 55] | 9 (21%) |
| Academic features | University features | Assessment grades (final exam, project, midterm exam, quizzes, lab grades), student attendance, and CGPA. | [5, 6, 16, 21, 23, 25–29, 31–34, 36, 40–46, 48–52, 54, 55, 58, 59] | 31 (72%) | Preuniversity features | High school courses grades, high school CGPA, preadmission requirement, and entry test. | [5, 6, 15, 27, 28, 37, 41, 45, 46, 49–52, 54–57, 60] | 18 (42%) |
| Extra features | Social and economic features | Impact of friends and family income. | [23, 25, 30, 41, 53] | 5 (12%) | Behavioral features | Discussion participates and self-study time. | [17, 25, 30, 31, 35, 37, 44, 46, 53, 58] | 10 (23%) |
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