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Does going to university in a different country affect your mental health? A Japanese international university surveyed its students in 2018 and published a study the following year that was approved by several ethical and regulatory boards.
The study found that international students have a higher risk of mental health difficulties than the general population, and that social connectedness (belonging to a social group) and acculturative stress (stress associated with joining a new culture) are predictive of depression.
Explore the students data using PostgreSQL to find out if you would come to a similar conclusion for international students and see if the length of stay is a contributing factor.
Here is a data description of the columns you may find helpful.
| Field Name | Description |
|---|---|
inter_dom | Types of students (international or domestic) |
japanese_cate | Japanese language proficiency |
english_cate | English language proficiency |
academic | Current academic level (undergraduate or graduate) |
age | Current age of student |
stay | Current length of stay in years |
todep | Total score of depression (PHQ-9 test) |
tosc | Total score of social connectedness (SCS test) |
toas | Total score of acculturative stress (ASISS test) |
SELECT *
FROM 'students.csv'-- Totaal aantal studenten
SELECT *
FROM 'students.csv';-- Totaal aantal internationale studenten & binnenlandse studenten
SELECT COUNT(CASE WHEN inter_dom = 'Inter' THEN 1 END) AS international_count, COUNT(CASE when inter_dom = 'Dom' THEN 1 END) AS domestic_count
FROM students-- Gemiddelde depressiescore bij internationale studenten
SELECT ROUND(AVG(todep), 2) AS gemiddelde_depressie_score,
ROUND(AVG(tosc), 2) AS social_connectedness_score,
ROUND(AVG(toas), 2) AS stress_score
FROM students
WHERE inter_dom = 'Inter'-- Gemiddelde depressiescore bij binnenlandse studenten
SELECT ROUND(AVG(todep), 2) AS gemiddelde_depressie_score,
ROUND(AVG(tosc), 2) AS social_connectedness_score,
ROUND(AVG(toas), 2) AS stress_score
FROM students
WHERE inter_dom = 'Dom'-- Find the average scores by length of stay for international students, and view them in descending order
SELECT stay,
ROUND(AVG(todep), 2) AS average_phq,
ROUND(AVG(tosc), 2) AS average_scs,
ROUND(AVG(toas), 2) AS average_as
FROM students
WHERE inter_dom = 'Inter'
GROUP BY stay
ORDER BY stay DESC;