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';- Explore and understand the data
SELECT COUNT(*) AS total_records
FROM students;SELECT inter_dom, COUNT(*) AS count_inter_dom
FROM students
GROUP BY inter_dom;
- Filter to understand the data for each student type
SELECT *
FROM students
WHERE inter_dom = 'Inter';SELECT *
FROM students
WHERE inter_dom = 'Dom';SELECT *
FROM students
WHERE inter_dom IS NULL;- Query the summary statistics of the diagnostics scores for all student
SELECT inter_dom, MIN(todep) AS min_phq, MAX(todep) AS max_phq, ROUND(AVG(todep)) AS avg_phq
FROM students
GROUP BY inter_dom;SELECT inter_dom, MIN(tosc) AS min_scs, MAX(tosc) AS max_scs, ROUND(AVG(tosc)) AS avg_scs
FROM students
GROUP BY inter_dom;SELECT inter_dom, MIN(toas) AS min_as, MAX(toas) AS max_as, ROUND(AVG(toas)) AS avg_as
FROM students
GROUP BY inter_dom;