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...
--Count of all students and count of student types
SELECT coalesce(inter_dom, 'No_identity') AS student_type, COUNT(*) AS total_students,
COUNT(inter_dom) AS total_student_types
FROM students
GROUP BY inter_dom;--Info of International students
SELECT *
FROM students
WHERE inter_dom LIKE 'Inte%';--Info of Domestic students
SELECT *
FROM students
WHERE inter_dom LIKE 'Dom%';--summary statistics by length of stay for all students
SELECT stay,
sum(todep) AS sum_php,
sum(tosc) AS sum_toscs,
sum(toas) AS sum_as,
round(avg(todep),2) AS avg_phq,
round(avg(tosc),2) AS avg_scs,
round(avg(toas),2) AS avg_as
FROM students
GROUP BY stay
ORDER BY stay;--average scores by length of stay for all students
SELECT stay,
round(avg(todep),2) AS avg_phq,
round(avg(tosc),2) AS avg_scs,
round(avg(toas),2) AS avg_as
FROM students
GROUP BY stay
ORDER BY stay;--average scores by length of stay for International students
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;