I am conducting research to see if there is an association between two conditions that present together in a specific cohort of patients, all with the same syndromic condition.
Due to the nature of the data collected there is no control group.
I have categorical clinical data and do not know if there is a statistical test or which statistical test should be conducted to determine if there is a significant association between the two conditions presenting together in this cohort.
Any suggestions would be very much appreciated.
You may try correlation test like Pearson for parametric test or Spearman for nonparametric test. Correlation test is basically to determine any significant relationship/correlation/association between 2 variables.
I appreciate your response and I will look into this. Thank you.
You could consider an association test too (correlation is more useful with continuous variables, or with ordinal data in the case of Spearman's Rank Order correlation). A Crosstab would show you how far the categories coincide; a Chi squared test would let you test if the association was significant. Chi squared is a general test - there are also tests for different types of variable. If your variables are both nominal you could use the Contingency Coefficient but if they are both ordinal you could use Kendal's tau-b.
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