DPH112 Biostatistics 2
Final Report
Elmer V Villanueva
1 Background
In this nal report, you will replicate and extend the analyses conducted by Sun
and colleagues in their paper
Sun J, Guo X, Zhang J, Wang M, Jia C, Xu A. Incidence and fatality of seri-
ous suicide attempts in a predominantly rural population in Shandong, China: a
public health surveillance study. BMJ Open 2015;5:e006762. doi:10.1136/bmjopen-
2014-006762.
You will need to download and read the original paper. The data used in
the study is found in the le called Sun.csv.
You must perform. the regression techniques described by Sun and colleagues
in their original article. In particular, you must replicate the results presented
in Table 3 of their paper. In addition, you must perform. three additional sets
of analyses that extends their work: (1) you must test the assumptions of the
original multivariable model presented by Sun and colleagues; (2) you must
rerun the analysis, this time using a Poisson regression model; (3) you must
test the assumptions of the Poisson regression model. You must present your
R command le. In a written report, you must describe your methods and
ndings.
2 Instructions
Prepare a written report of no more than 3,000 words, at least three and no
more than seven gures and at least three and no more than seven tables. The
report must show that you are able to
1. describe the methods you’ve employed (10 marks);
2. summarise the results of the regression analyses (20 marks);
3. summarise the results of the diagnostic tests (20 marks);
4. interpret the ndings in the context of the research question (10 marks);
and
5. use technical English appropriately (5 marks)
The R le must show that you are able to
1. import data from Excel to R (5 points);
2. perform. a logistic regression analysis (10 points);
3. perform. a Poisson regression analysis (10 points);
4. perform. tests of the validity of the models (10 points)
3 Submission
You must submit two les.
File 1 is the research report in PDF format. The le must be named
:pdf. For example, 123456789.pdf.
File 2 is the R command le. The le must be named :R.
For example, 123456789.R.
You must submit the les via ICE. All penalties for late or incomplete submis-
sions apply.
4 Marking Rubric
Criterion Level 1 Level 2 Level 3 Level 4