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';Total records in the dataset
-- checking total records
SELECT count(*) AS total_records
FROM 'students.csv';There are 286 records in our dataset
Count of Records by student type
-- checking records by student type
SELECT inter_dom, count(*) as count_inter_dom
FROM 'students.csv'
GROUP BY 1;From the result set we see we have more "inter" student type with 201 records, "Dom" student type with 67 records, and finally 18 students with unknown status (null).
Summarizing the depression scores
--Finding the summary statistics
SELECT
MIN(todep) AS min_phq, MAX(todep) AS max_phq, ROUND(AVG(todep),2) AS avg_phq
FROM
'students.csv'Accross the dataset we see that the min depression score is 0, max depression score is 25, and the average depression score is 8.19
Summarizing the social connectedness scores
SELECT
MIN(tosc) AS min_scs, MAX(tosc) AS max_scs, ROUND(AVG(tosc),2) AS avg_scs
FROM
'students.csv'