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 count(*) as total_records ,
from 'students.csv';
select Inter_dom, count(Inter_dom) as count_inter_dom
from 'students.csv'
group by inter_dom-- Query for inter_dom students
SELECT *
FROM 'students.csv'
WHERE inter_dom = 'Inter';
-- Query for domestic students
SELECT *
FROM 'students.csv'
WHERE inter_dom = 'Dom';
-- Query for students with unknown status
SELECT *
FROM 'students.csv'
WHERE inter_dom IS NULL;--summary statistics of depression (PHQ-9 test)
select inter_dom,max(todep), min(todep), round(avg(todep),2) as average_phq
from 'students.csv'
group by inter_dom--summary statistics social connectedness (PHQ-9 test)
select inter_dom,max(tosc), min(tosc), round(avg(tosc),2) as average_scs
from 'students.csv'
group by inter_dom--summary statistics of acculturative stress (PHQ-9 test)
select inter_dom,round(max(toas),2), round(min(toas),2), round(avg(toas),2) as average_as
from 'students.csv'
group by inter_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.csv'
WHERE inter_dom = 'Inter'
GROUP BY stay
ORDER BY stay DESC;