I have a question regarding a mixed model analyses in SPSS. I have 2 groups (shift workers and non shift workers), each individual has different number of observations (depending on the frequency of the onset of a disease). But it is clear that shift workers have higher frequency of the disease than non-shift workers. Depending on the onset of a disease, absenteeism was measured. I know that mixed model can deal with missing data. But does it also takes into account that shift workers has more observations than non-shift workers?
Because depending on that, my interpretation of the results would be different.