Dear Colleagues

I am wondering if any one could help suggest the most appropriate statistics for my query.

I am looking at the time taken for patients to complete an electronic questionnaire and would like to assess whether the time taken is impacted by age group, treatment modality and employment status. Patients have completed the questionnaires over 10 different time points.

I know the time points will impact completion time (patients become familiar with questionnaire over time). So have accounted for this as a variable.

I would like to adjust for the time points but the focus of analysis would be on the dependent variables listed above.

I have considered multivariable analysis or a linear mixed model, but am now getting confused for which is the best to proceed with.

Grateful for your advice!