I am trying to decide which longitudinal analysis I should choose for my study. I collected data at four different time points:
1. Before the intervention
2. After the intervention
3. Three months after the intervention
4. Six months after the intervention
Study design: 12 participants took an intervention made to foster a sense of purpose in life. I want to see whether the toolkit fostered purpose and if the effects held over a period of time.
Hi Ximena,
Your choice of analysis will be guided by whether this is a single-arm study or you seek to make a comparison with another group. It will also be important to identify whether your outcome is a continuous or categorical variable.
Regards,
Godfrey Habil Mudhune Thank you for your response! No comparisons will be made with another group in this study. Additionally, the outcome is continuous.
Thanks again!
Hi Ximena,
You could consider using a simple strategy, like a paired t-test, to compare the outcome at different time points in your single arm study.
Regards,
I do recommend " Applied Longitudinal Analysis, 2nd Edition"
by Garrett Fitzmaurice, Nan Laird & James Ware
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