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# How to Compute & Recode SPSS Data

How to Compute & Recode SPSS Data. Video at https://youtu.be/QrE6SuxYAuQ

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### How to Compute & Recode SPSS Data

1. 1. Compute & Recode SPSS Data http://www.palmx.org/drtamil/spss/sga-youtube.sav
2. 2. ©drtamil@gmail.com 2016 Factors Affecting SGA SGA (Y/N) (Birth weight) Mother’s Nutrition (BMI/Obesity) •Weight •Height Smoking Hypertension
3. 3. ©drtamil@gmail.com 2016 Dependent Outcome  Birth weight of the babies  Small for gestational age i.e. less than 2.7kg for term babies – Y/N By Yehudamalul - Own work, CC BY-SA 3.0,
4. 4. ©drtamil@gmail.com 2016 Factors Affecting SGA SGA (Y/N) (Birth weight) Mother’s Nutrition (BMI/Obesity) •Weight •Height Smoking (Y/N) Hypertension (Y/N)
5. 5. ©drtamil@gmail.com 2016 Recode and transform to do test  We were asked to conduct the appropriate statistical test to test whether there is any association between “Classification of Weight” (OBESCLAS) and SGA (OUTCOME).  So we need to compute weight and height into BMI, then recode BMI into classification of underweight, normal and overweight.
6. 6. ©drtamil@gmail.com 2016 Steps to recode To compute Body Mass Index  formula Weight/Height2 ◦ Weight in kg ◦ Height in m (so need to change ours from cm to m by dividing with 100) Then recode BMI into Classification of Weight  <20 Underweight  20 to 24.99 Normal  25 & > Overweight
7. 7. ©drtamil@gmail.com 2016 https://youtu.be/QrE6SuxYAuQ Click on “Compute Variable”
8. 8. ©drtamil@gmail.com 2016 Type in the variable name/label