I'm trying to put a title over a factor variable by using the refcat command of esttab. However, the first level of my variable is being ommitted due to collinearity in the regression, so when I try to use refcat(1.category "Category Title") , it does not know what 1.category is and omits the title altogether.

My code is:

Code:
reghdfe y ib(last).pair_c ib(last).pair_c#grade , a(week)
esttab using "out.tex", refcat(1.pair_c "Pair Type")
Manually, in the above code, I can change 1.pair_c to 2.pair_c and it will work. However, is there a way I can dynamically have stata figure out the first non omitted level of pair_c?