Case control matching in R (or spss), based on age, sex and ethnicity?

Hi, I have a data frame that includes people who developed end stage renal disease (ESRD) and those who didn't (controls). I want to match my cases with controls based on age, sex and ethnicity....

01 February 2018 7,613 5 View

Measurement bias in longitudinal study?

Hi, I am looking at longitudinal data where parameter say "blood creatinine levels" is measured at different follow up intervals, say "time 1", "time 2" and "time 3". I want to see the change in...

05 June 2017 9,597 4 View

Meta-analysis of non-overlapping strata-The Mantel-Haenszel Formula?

I have stratified my results according to Ethnicity (south asians and Europeans), Gender (Male and female) and Age (4 different age groups). So I have a Beta value (from regression) for South...

09 October 2016 330 2 View

How to assess accuracy of prediction model?

Hi, Can any one suggest a statistical test to determine the accuracy of a prediction model? The prediction model has been developed using multiple linear regression and the variables are...

08 September 2016 5,546 18 View

How should I write my results in terms of R2?

I have used R2 to assess the efficacy of my prediction model (which i developed using multiple linear regression) i want to write my results now in terms of R2 and the predictors that are involved...

08 September 2016 2,497 3 View

How can I split data into 70 % training and30% testing set in SPSS or excel please?

How can I split data into 70 % training and 30% testing set in SPSS or excel please? Kindly tell me the step involved. Thank you

07 August 2016 3,320 0 View

Do you know how to test an interaction between a covariate and an independent variable using SPSS?

I am determining the association between physical activity and fasting glucose levels amongst South Asians and Europeans using Multivariate linear regression. I want to see the possible...

05 June 2016 1,718 3 View

Binary Logistic Generalized Linear Mixed model in SPSS. Is it doable?

I want to analyses the proportion of swimming sperm of three species of fish in two salinities. To analyse the proportion of swimming sperm in a Generalized Linear Model, I would use a Binary...

03 March 2021 2,297 3 View

What test should i use in comparing the correlation between categorical and continuous variables?

Dear all, I have the variable (Surgery duration) represented by values in minutes and the variable (preoperative neuropraxia cases) represented as (Yes/No) values. I want to compare these two...

03 March 2021 5,427 5 View

Logistical regression using SPSS for a dichotomous dependent variable, with an independent variable of 1, 2, 5 and 10 seconds?

I have an experiment with 28 participants The independent variable is the times 1, 2, 5, and 10 used as the cross hairs during a task These 4 times were tested using 4 different blocks, each...

03 March 2021 9,692 2 View

How to find the mean, SD and CI in SPSS?

Hi, I hope that someone can help me with this task: I have 5 groups of participants which are numbered in SPSS from 1 to 5 (according to their group number) and are all under the variable group....

03 March 2021 506 3 View

What degree of missing data in a particular case/participant results in Expectation-Maximisation no longer working?

I'm dealing with a mediation model and am using the PROCESS module in SPSS. Due to SPSS and PROCESS being limited in the imputation methods - being unable to handle multiple imputation - the other...

02 March 2021 4,362 1 View

How to code open-ended questions in SPSS?

Hello all, In SPSS I am going to code 2 open-ended questions. I have already read all the answers and I made a list of the most important categories to which I can code the answers. This question...

02 March 2021 1,757 4 View

The procedure compute?

02 March 2021 5,204 3 View

Does anyone know what a '.' means in SPSS?

Hi everyone! I was wondering if anyone would be so kind as to help me with regards to my data set on SPSS! I was checking for multivariate outliers via the standardised residuals ('Linear...

02 March 2021 7,910 3 View

How to calculate BREQ 3 questionnaire?

how to calculate BEHAVIOURAL REGULATION IN EXERCISE QUESTIONNAIRE BREQ 3 ,which contain 24 questions and each question has 5 answers (0- Strongly disagree , 1-disagree, 2- Neither agree nor...

02 March 2021 811 3 View

What SPSS analysis should I run with one IV (with two levels) and two DVs?

Hi, I am trying to figure out which test would be most appropriate to run for the following question: Is there a difference in task blood pressure between smokers and non-smokers? There are two...

01 March 2021 8,235 2 View