longitudinal analysis

  1. D

    What model for a discrete value with repeated observations

    Hi, I want to model smoking (0-1) with some socioeconomic characteristics (edu, age, cohort, sex, etc.). I have 4 waves of a survey, some respondents are present in all waves, while other started in waves 2, 3, etc. The duration between waves is also not always the same (i.g. 2 years between...
  2. D

    What model should I use?

    I have a longitudinal survey (5 waves) that collects a health index (from 0 to 100) and some risk factors and socioeconomic characteristics. I want to develop a model that will predict this health index (with consistent biographies, meaning that the predicted health index should not be...
  3. J

    CI to percentage change in ICC

    I'm running fixed effects models to estimate changes in intra class correlations. I first run an unconditional model and then a second model including only level-2 factors. I'm interested in the reduction of the icc when adding only level-2 factors. I'm interested in expressing the...
  4. T

    Which analysis to choose? Urgent

    Hi, any help is greatly appreciated. I have data from the same children at ages 4, 7 and 11 for a variable (self-regulation) created from a questionnaire. The data for this variable is numbers from 1-4 (the mean of their scores from the questionnaire). I need to compare the differences...
  5. R

    Measuring change over time- How to make measures from two datasets comparable?

    Greetings!!! I'm interested in learning how students' academic skills change overtime, to what extent, and how college contributes to this. Academic skills include reading skills, quantitative reasoning, and English as a second language (ESL). Data on these variables are collected both...
  6. L

    Longitudinal analysis

    Hello. I would love some help: I have a dataset with 111 cases of a rare disease registered throughout a 10-year period in one Hospital. I have something like 50 variables (most of them are dichotomous, but some are ordinal and some are continuous intervals). Initially, I divided this 111...