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Introduction to Stata 8 - (GRIPS

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Contents<br />

1. Installing, cus<strong>to</strong>mizing and updating <strong>Stata</strong> 3<br />

2. Windows in <strong>Stata</strong> 5<br />

3. Suggested mode of operation 7<br />

4. Getting help 9<br />

5. <strong>Stata</strong> file types and names 10<br />

6. Variables and observations 11<br />

6.1. Variable names 11<br />

6.2. Numeric variables 11<br />

6.3. Missing values 12<br />

7. Command syntax 13<br />

8. Getting data in<strong>to</strong> <strong>Stata</strong> 16<br />

9. Documentation commands 18<br />

10. Modifying data 20<br />

10.1. Calculations 20<br />

10.2. Selections 21<br />

10.3. Renaming and reordering variables 23<br />

10.4. Sorting data 24<br />

10.5. Numbering observations 24<br />

10.6. Combining files 25<br />

10.7. Reshaping data 26<br />

11. Description and analysis 27<br />

11.1. Categorical data 27<br />

11.2. Continuous data 30<br />

12. Regression models 32<br />

12.1. Linear regression 32<br />

12.2. Logistic regression 33<br />

13. Survival and related analyses 34<br />

14. Graphs 38<br />

15. Miscellaneous 54<br />

15.1. Memory considerations 54<br />

15.2. String variables 55<br />

15.3. Dates. Danish CPR numbers 57<br />

15.4. Random samples, simulations 59<br />

15.5. Immediate commands 60<br />

15.6. Sample size and power estimation 61<br />

15.7. Ado-files 62<br />

15.8. Exchange of data with other programs 63<br />

15.9. For old SPSS users 63<br />

16. Do-file examples 65<br />

Appendix 1: Purchasing <strong>Stata</strong> and manuals 67<br />

Appendix 2: Entering data with EpiData 68<br />

Appendix 3: NoteTab Light: a text edi<strong>to</strong>r 70<br />

Alphabetic index 71<br />

2

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