age

  1. B

    How to check gender and age matching

    Hello girls and guys, I have worked on a study for which I was blinded in the first part. I always assumed that the patients and controls were gender and age matched because I was told so. Now I have the list of birth dates and gender affiliation and I would like to state in my paper/thesis...
  2. M

    Cohort as level 1 regressor in hierarchical age-period-cohort models (HAPC models)

    Dear Talkstats, What a great site! :tup: I cannot believe I only just discovered the site. I look forward to many interesting debates with you guys in the future. Currently, I'm having some trouble understanding the way Raphael J. Nawrotzki and Fred C. Pampel make use of 'Cohort' as a level 1...
  3. S

    regression on age groups

    Dear All, I have the following question: Estimate a simple regression model of ‘libertarian-authoritarian’ attitude as a function of age groups and comment on the sign, significance and magnitude of the effects. I have one variable (and only one) called AgeGr and the age groups are 18-25...
  4. J

    calculating probability of disease according to age

    I'm making a program which, at one point, is supposed to estimate the probability of having a certain disease based on the patient's age. I'm going to feed the mean age at which the disease occurs, along with the standard deviation, into the program, but I can't figure out how to actually...
  5. R

    Age and gender effects in neuropsychological tests

    Dear friends, I will try to ask it simple: Dependant variable: scores of a cognitive test (scale) independant variables: brain atrophy (yes,no), family history (yes,no), gender (m,f), age(scale) I am searching if brain atrophy group performed worse in cognitive tests. However atropy...
  6. C

    Age and DNA methylation data: HELP NEEDED

    I have data on patient Age as well as change in % DNA methylation levels for promotor regions. I seek to understand the impact of Age on the % change in DNA methylation levels. What is the best way to do this? Paired t-test of Age vs % change in DNA methylation data yields ridiculously high...
  7. P

    Demographics adjustment for combined counts

    Hello! My unit of observation was cities within a county. Since asthma counts were too small for each city, I decided to combine counts from various cities by a binary variable (all 'yes' cities combined and 'no' cities combined). How can I then adjust for demographic variables, such as age...
  8. A

    predicting discrete variable (age) from continuous data and transformations

    Hi, i have data on age (years) and a continuous variable (weight for example). I want o predict the age using a linear regression. However, i understand that age is discrete and therefore may not be directly used. So i log transformed both the age and the weight but now i checked the residuals...