Recent content by Davidk

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    ps matching and mcnemar test in spss

    do you know if can create an output file that would give me this using my spss- I have the fuzzy python extension. I guess the output file needs to have basically three variable "match id; outcome for exposed; outcome for non-exposed" in order to run the test
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    ps matching and mcnemar test in spss

    thank you for both your answers. does conditional logistic regression provides roughly the same results as a mcnemar test? could you please explain in a bit the meaning of a conditional logistic regression? regards
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    ps matching and mcnemar test in spss

    Hello! I am using spss to analyze my data set. 1. I want to match my cases and controls (I have a lot of controls and a small set of cases) using ps matching. I can give ps scores using logistic regression but I have trouble matching them - I understood there are all kind of extensions to...
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    Logistic regression - hosmer lamselow goodness of fit

    Greetings I run a binary logistic regression. I try to choose among many many covariates I have these that are possible confounders and when building the regression line I think I tried to make a good coverage of these confounders and relevant covariates. I run the same regression for few...
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    Comparing proportions (or comparing performances of diagnostic tools)

    Thank you hlsmith. Would you mean by that to make the dependent variable true positive rate (what I called sensitivity - e.g. the number of symptoms the software discovered out of the total number of symptoms for each vignette) and the categorical independent variable the softwares identity...
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    Comparing proportions (or comparing performances of diagnostic tools)

    Thank you. By comparing means in this scenario you mean ANOVA? Is it okay that the variable is a proportion?
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    Comparing proportions (or comparing performances of diagnostic tools)

    Hey everyone and thanks in advance for your attention I'm trying to compare the performances of 5 different softwares acting as diagnostic tools. all they do is asking the patient questions for symptoms. I have given each software 20 vignettes in which everyone has 20-40 symptoms the softwares...
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    Dose Response and logistic regression

    Hello and thank you for your time. It's quite long so you could get the accurate picture I'm investigating the association between a (life time mean) vitamin level and the occurrence of a disease (yes/no). I am using a 4600 patients data set (after cleaned) among 160 developed the disease and...
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    How to do linear regression for multiple subjects

    It's correct. I would not be able determine if the change is due to the process or time. I'm looking for change over time. I'll try to preform a repeated measure analysis and to read a little bit (I'm not sure I understand the linear contrast issue) Thank you
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    How to do linear regression for multiple subjects

    Hey Karabiner, thank you for responding. The intervention is CBT session. There are 4 of those during the month I followed the patients but for now I'm not interested in checking how they interfered independently but more on did the process had an impact. The question is - my H0 is that along...
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    How to do linear regression for multiple subjects

    Hello, super - basic question, thanks in advance: I'm trying to analyze the impact of group session meetings on sleep quality of (preliminary 7, but around 28 subjects eventually) 7 different patients. Each morning they have assigned the time they slept (in minutets for instance) for a period...
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    Comparing three different slopes between three regression lines

    oh I just noticed the sketch I did is not good! it should be three different treatment so in green its y=b2x+a2
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    Comparing three different slopes between three regression lines

    The cells were a mixture from few mice that went through the same conditioning and after separated for three groups randomly the treatment applied
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    Comparing three different slopes between three regression lines

    Treatments were assigned randomly. It's a basic science experiment in which I took cells from mice and put them through 3 different treatments and then checked one of their function (the y axis) in different time periods. every 30 minutes I checked for the groups. I expected the treatment to...
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    Comparing three different slopes between three regression lines

    Hi all, I hope the thread is in it's place. I wanted to compare slopes between three different simple regression lines. The three data sets have the same x (time) and y (measured value) variables but each data set have gone through a different treatment and so the intercept and the slopes are...