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) |
-- Run this code to save the CSV file as students
SELECT *
FROM 'students.csv';-- Start coding here...
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 stay IS NOT NULL
AND inter_dom = 'Inter'
GROUP BY stay
ORDER BY stay DESC;
SELECT COUNT(*)
FROM students;SELECT COUNT(*)
FROM students
WHERE inter_dom = 'Inter';SELECT inter_dom, ROUND(AVG(todep),2) AS avg_todep, ROUND(AVG(tosc),2) AS avg_tosc, ROUND(AVG(toas),2) AS avg_toas, MIN(todep) AS min_todep, MAX(todep) AS max_todep, MIN(tosc) AS min_tosc, MAX(tosc) AS max_tosc, MIN(toas) AS min_toas, MAX(toas) AS max_toas, PERCENTILE_CONT(.5) WITHIN GROUP (ORDER BY todep) AS med_todep, PERCENTILE_CONT(.5) WITHIN GROUP (ORDER BY tosc) AS med_tosc, PERCENTILE_CONT(.5) WITHIN GROUP (ORDER BY toas) AS med_toas
FROM students
WHERE todep IS NOT NULL
AND tosc IS NOT NULL
AND toas IS NOT NULL
GROUP BY inter_dom;SELECT *
FROM students
WHERE inter_dom IS NULL
OR todep IS NULL
OR tosc IS NULL
OR toas IS NULL;