Linked Questions

5 votes
5 answers
20k views

What is a multivariate logistic regression

There are a lot paper in medical researches using multivariate logistic regression. I am wondering if the multivariate logistic regression is just the mixed effects logistic regression or something ...
Deep North's user avatar
  • 4,746
7 votes
1 answer
2k views

Use of fixed effects and random effects

When can we do a linear regression without fixed or random effects and when do we need to use those in the regression analysis? I have tried studying a lot but have got only a vague idea. I would be ...
Srewashi Lahiri's user avatar
5 votes
1 answer
1k views

Regression slope that increases persistently as my sample size increases

I found a peculiar feature in some data that I am analyzing and was wondering whether there was a technical term for this type of phenomenon and whether anyone has come across it before. I am doing a ...
Rene's user avatar
  • 81
4 votes
2 answers
842 views

Identifying subject specific outliers in the presence of between subject heterogeneity

I have a simple dataset of people's heights, many people with measurements on multiple days (once a year for 10 years, say). I have the date of each measurement. Some of the height values are absurd....
rambles's user avatar
  • 293
10 votes
3 answers
209 views

Measuring some of the patients more than once

I'm conducting a clinical study where I determine an anthropometrical measure of the patients. I know how to handle the situation where I have one measure per patient: I make a model, where I have a ...
Wronski's user avatar
  • 101
1 vote
1 answer
840 views

mean of repeated measures...spot the (matlab) error

I have a population of 114 subjects. For each subject I have repeated measurements (1 each day) of the variable assessed (activity level). The number of measures varies for each subject (number of ...
gabboshow's user avatar
  • 683
1 vote
2 answers
367 views

Linear model with multiple measures

Consider the following situation: I have several individuals (say 10), and for each of these individuals there is a covariate $x$ which linearly determines an outcome $y$. I can measure $y$ with some ...
Elvis's user avatar
  • 12.8k
1 vote
0 answers
251 views

Percent Change of Averages - Statistically significant testing and Standard Error [closed]

I have several different experimental conditions and for each condition I measure a value at Day 0, 4, 8, 12, and 16. (Control N=15, Condition 1 N=8, Condition 2 N=4...etc.) Given that the starting ...
anr's user avatar
  • 11
0 votes
1 answer
48 views

Validity of an error term regarding individual variability (R)

Here is my data: _ I measured the response of a variable "Y" to 3 different treatments over time. "Treatment" is hence a 3 levels factor and "Time" is a continuous and numeric variable (unit=hours, ...
CupOfAppleTea's user avatar
1 vote
1 answer
29 views

How to calculate the post-hoc treatment effect depending on initial burden of patient

I have longitudinal data following patients before and after a dichotomous treatment. Exploratory analyses strongly suggest that the effect of the treatment depends on the initial burden of the ...
Johannes's user avatar
  • 1,178