Hello, I am attempting to export the results from multiple univariate regression models estimated using looping into a single table that includes the coefficient, se, p-value and CIs. I have tried below and run into the error: estimation result : not found

I appreciate any help. Thanks.

foreach var of varlist updrs3_total_on updrs3_total_off ///
updrs1_cogimp_11 updrs1_lighthead_112 updrs1_fatigue_113 updrs2_freezing_213 {
estout: quietly nbreg falls_total `var'
}




Code:
* Example generated by -dataex-. For more info, type help dataex
clear
input float(falls_total updrs3_total_on updrs3_total_off) byte(updrs1_cogimp_11 updrs1_lighthead_112 updrs1_fatigue_113 updrs2_freezing_213)
 0 29 38 0 0 0 0
 0 14 23 1 2 1 0
 0 30 38 0 1 1 0
 2 24 40 1 1 1 2
 4 32 39 0 2 1 1
 0 14 20 1 1 1 0
 0 32 37 1 0 0 0
 1 36 48 0 0 1 3
 0 24 39 3 1 2 0
 1 28 37 1 0 0 0
 0 36 48 0 0 0 0
 0 12 15 0 0 0 0
 0 41 46 0 2 1 1
 4 34 33 1 1 0 0
 8 52 57 3 2 2 0
 2 21 35 0 2 1 0
38 56 67 3 0 3 0
 3 24 30 1 0 0 0
 0 10 21 0 0 0 1
 0 30 42 0 0 0 1
 1 46 54 1 2 2 0
13 46 68 1 1 4 2
 0 34 38 0 0 2 0
 0 22 25 0 1 1 0
 0 20 29 0 0 0 0
 1 23 30 0 0 1 0
 0 42 55 0 1 1 0
 0 37 47 1 2 3 0
 0 19 32 0 1 0 0
 0 28 33 1 0 1 0
 0 37 31 0 1 1 0
 0 35 47 0 0 1 1
 0 17 19 0 0 1 0
 1 39 49 1 1 1 0
55 41 53 0 0 1 3
 1 32 40 0 0 0 0
 1  8 11 0 1 0 0
 3 40 47 1 1 2 1
 0 16 20 0 0 1 0
 0 42 59 0 0 0 1
 5 24 33 1 1 1 0
 0 25 35 0 0 2 0
 0 31 35 1 2 2 0
 0 41 58 0 0 1 1
 0 27 35 1 2 1 0
 2 45 54 1 1 2 1
 2 25 39 2 0 1 0
 1 38 54 0 0 1 0
 0 29 38 0 1 1 1
 1 33 43 1 1 0 0
 0 39 44 1 0 1 0
 1 29 32 1 1 1 0
 0 42 46 0 3 3 1
 5 56 71 0 3 3 0
 0 40 50 0 0 1 0
 0 36 60 0 0 0 0
 4 59 57 1 1 1 2
 0 31 40 0 0 0 0
 0 24 29 0 0 1 0
 1 44 50 1 0 0 0
 0 15 21 0 0 1 0
 1 31 47 1 1 0 1
 0 18 20 0 1 0 0
 0 43 50 0 0 2 0
 5 43 50 1 1 1 2
 0 38 52 0 0 0 0
 1 22 22 0 0 2 0
 0 32 36 1 0 0 0
 1 32 44 0 0 0 1
 4 63 75 1 2 1 0
 0 46 57 0 0 2 0
 0 58 68 0 1 0 0
 0 46 52 0 0 0 1
 0 59 68 0 0 0 0
 0 39 43 0 0 0 0
 0 19 22 0 0 0 0
 0 24 39 1 0 1 0
 0 29 38 0 2 2 0
 2 63 79 0 2 2 0
 1 29 39 1 3 0 0
 0 20 24 1 1 1 0
 1 22 46 0 0 0 0
 3 36 59 1 3 2 2
 0 35 67 1 1 1 0
 0 45 38 0 0 1 0
 1 21 27 0 1 1 1
 3 51 52 2 3 2 0
 0 26 21 0 0 0 0
 2 20 19 0 0 0 0
 1 14 19 2 1 1 0
 1 10 14 0 1 3 0
 0  7 12 0 1 1 0
 1 18 25 0 0 0 0
 1  9 20 1 0 1 0
 0 31 31 0 1 1 0
 0 18 22 0 0 1 0
 0 27 24 0 0 0 0
 0 27 38 0 1 1 2
 0 39 44 0 0 1 0
 1 25 29 0 0 1 0
end