adjustment

  1. H

    Age Adjusted Incidence Rates Using Poisson Regression

    Hello, I am not sure how to calculate age-adjusted incidence rates using poisson regression. I am comparing injuries for children at two schools, offset by child-days in school and would like to adjust for age. I ran the following model: poisson injuries school i.age, offset(childdays) I...
  2. A

    Adjustment for correlated data in meta-anlaysis

    Hi, I'm completing a systematic review and performing meta-anlaysis forest plots. The research question related to the finding of risk factors for a complication of diabetes. There are therefore many different risk factors and often there are only three papers with similar...
  3. K

    Assumptions independent variables when just want to control/adjust for - less strict?

    Is it true that when one just want to control for/adjust for in linear og logistic regression models, the variables one wants to control for/adjust for does not have to meet the assumptions of these models? For instance, if one wants to control for age, sex and education (common confounders)...
  4. P

    Accounting for demographics when outcome is rates

    Hello, I've been reading some public health papers and they account for demographic factors such as age, gender, and race in regression models (poisson/negative binomial) where the outcome is daily/monthly rates. Considering that the demographic factors are at the individual level and rates...
  5. R

    Differing p values on rep-measures ANOVA: Sphericity Assumed vs Multivar test

    I've run a 2x3x2 repeated measures ANOVA on SPSS. This brings an output with two tables that show you p values for the main effects and interactions. The first is called 'Multivariate Tests'. This gives 4 p-values for each contrast, however as I only run univariate analyses these 4 values...
  6. S

    Simple effects- multiple comparisons adjustments necessary?

    Hi guys, I cannot seem to figure out what the correct procedure is for simple effects analysis when decomposing interactions. So I have a significant interaction in a RM ANOVA- I decompose the interaction using simple effects in SPSS (by manipulating the syntax) and I find whats driving the...