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natasha_nf
‎04-10-2021
  • 7 Posts
  • 3 Likes Given
  • 0 Solutions
  • 0 Likes Received

How to control variables in logistic regression?

by Fluorite | Level 6 in SAS Procedures
‎05-29-2019 10:18 AM
‎05-29-2019 10:18 AM
Hi,   I'm trying to perform 2 logistic regressions controlled for some variables.   exposure: quartiles of processed food consumption   outcome model 1: binary depression (yes or no) outcome model 2: mental disorders (4 disorders)   confoundings: (categorical and numerical) sex, age, education, etc.   Could anyone help me with the code?   Thank you in advance.   ... View more

Re: Interaction test between SEX and QUARTILES with a BINARY OUTCOME

by Fluorite | Level 6 in Statistical Procedures
‎05-29-2019 09:27 AM
‎05-29-2019 09:27 AM
Thank you very much!   In the case of a multinomial outcome i.e.: different mental disorders, would the procedure be the same? ... View more

Re: Interaction test between SEX and QUARTILES with a BINARY OUTCOME

by Fluorite | Level 6 in Statistical Procedures
‎05-29-2019 09:25 AM
‎05-29-2019 09:25 AM
Thank you very much!   In the case of a multinomial outcome, i.e.: different mental disorders, would the procedure be the same? ... View more

Interaction test between SEX and QUARTILES with a BINARY OUTCOME

by Fluorite | Level 6 in Statistical Procedures
‎05-28-2019 12:44 PM
‎05-28-2019 12:44 PM
Hello,   I want to check if there is an interaction between sex and quartiles of soda consumption in the case of a binary outcome. How should I proceed?   exposure: quartiles of soda consumption outcome: presence or absence of depression covariate sexe: female, male   Thank you in advance! ... View more

Re: How can I compare variables from different tables?

by Fluorite | Level 6 in SAS Procedures
‎05-28-2019 05:34 AM
‎05-28-2019 05:34 AM
Hi Tom,   I must admit I don't really see what you mean, I'm sorry. Anyway, I included the by ID variable and indeed, it changed the order the dataset is sorted. However, I did not affect my tests.   Thank you ... View more

Re: How can I compare variables from different tables?

by Fluorite | Level 6 in SAS Procedures
‎05-27-2019 11:27 AM
‎05-27-2019 11:27 AM
Thank you Reeza!   Actually I've done something slightly different. I merged the original (with all included and excluded individuals) and the "excluded" tables and created a binary "included" variable. data incexc; merge original (in=a) excluded (in=b); if a and not b then included='1'; else included='0'; run;   Then I performed all the t and x2 tests I needed. ... View more

How can I compare variables from different tables?

by Fluorite | Level 6 in SAS Procedures
‎05-27-2019 09:15 AM
‎05-27-2019 09:15 AM
Hi,   I would like to compare the sociodemographic characteristics (mean age, bmi, education distribution, etc.) between individuals included and excluded (due to aberrant/missing data) from my analysis.   I have a table "included" with around 43k individuals and a table "excluded" with around 5k individuals.   How should I proceed?   Thank you in advance,   Natasha Figueiredo     ... View more
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