Hi again,
I've run a POPAN model, and the most parsimonious model has pent varying by time and group covariate (injury).
All looks great (reasonable SE's, not overlapping between the two groups) until I look at the confidence intervals. There is large overlap between injured vs non-injured at each year.
What can I conclude from this? It has me a little stumped. I've seen a couple of published papers where they state that overlapping confidence intervals means there's no difference between the groups, is this a reasonable conclusion to make? I'd expect the SE to be much larger? Should I not have allowed pent to vary across group covariate in the first place, and just kept it as varying across time?
Pent output is as follows;
year injuries est se uci lci
2014-15 major 0.06 0.03 0.02 0.16
2015-16 major 0.09 0.03 0.04 0.17
2016-17 major 0.06 0.02 0.03 0.13
2017-18 major 0.04 0.02 0.01 0.10
2018-19 major 0.04 0.02 0.02 0.10
2014-15 none 0.14 0.06 0.06 0.31
2015-16 none 0.22 0.06 0.12 0.37
2016-17 none 0.15 0.05 0.07 0.29
2017-18 none 0.10 0.04 0.04 0.22
2018-19 none 0.11 0.04 0.05 0.23
Thanks a million!