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SAS 3: Inputting data manually for Odds Ratios and Relative Risk Last week, you learned how to read an excel file into SAS. There are other ways to get data into SAS. For instance, if you already have...

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SAS 3: Inputting data manually for Odds Ratios and Relative Risk
Last week, you learned how to read an excel file into SAS. There are other ways to get data into SAS. For instance, if you already have your 2x2 table ready and you just want SAS to calculate either your Odds Ratio or your Relative Risk, you can input the data directly into SAS using a function called datelines. Here is an example of how data lines works. Note in the code below the data is called GORDIS, and the input are delineated by the $ telling the data what each column represents
DATA gordis ;
        INPUT exposed $ disease $ patients ;
DATALINES ;
        exposed disease 50
        exposed none    50
        not_exp disease 25
        not_exp none    75
;
PROC FREQ DATA = gordis ;
  TABLES exposed*disease / RELRISK RISKDIFF;
  WEIGHT patients ;
RUN ;
1. Run the above program and screenshot the results. You will now put that into a word document as part of your submission.
2. Now look up your own example of a 2x2 table. Create your own code and screenshot the code as well as the result. You want to change the labels of the graph to reflect your own data yet. You also should change the name of the data file.
Answered Same Day Mar 11, 2022

Solution

Subhi answered on Mar 12 2022
98 Votes
ANSWER 1
DATA gordis ;
INPUT exposed $ disease $ patients ;
DATALINES ;
exposed disease 50
exposed none 50
not_exp disease 25
not_exp none 75
;
PROC FREQ DATA = gordis ;
TABLES exposed*disease / RELRISK RISKDIFF;
WEIGHT patients ;
RUN ;
    The SAS System
The FREQ Procedure
            Frequency
    Percent
    Row Pct
    Col Pct
        Table of exposed by disease
    exposed
    disease
    
    disease
    none
    Total
    exposed
        50
    25.00
    50.00
    66.67
        50
    25.00
    50.00
    40.00
        100
    50.00
    Â 
    Â 
    not_exp
        25
    12.50
    25.00
    33.33
        75
    37.50
    75.00
    60.00
        100
    50.00
    Â 
    Â 
    Total
        75
    37.50
        125
    62.50
        200
    100.00
    Statistics for Table of exposed by disease
    Column 1 Risk Estimates
    Â 
    Risk
    ASE
    (Asymptotic) 95%
Confidence Limits
    (Exact) 95%
Confidence Limits
    Row 1
    0.5000
    0.0500
    0.4020
    0.5980
    0.3983
    0.6017
    Row...
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