Using add_overall() before add_n() in tbl_summary() doubles n

[brachem-christian]

Hello,

thanks for the awesome package!

When adding both add_overall() and add_n() to a tbl_summary() the results change depending on the order. When add_overall() is used first, the N are doubled.

Reprex:

Doubled N:

library(gtsummary)

tbl_summary(iris, by = Species) |> 
  add_overall() |> 
  add_n()

Characteristic	N	Overall, N = 1501	setosa, N = 501	versicolor, N = 501	virginica, N = 501
Sepal.Length	300	5.80 (5.10, 6.40)	5.00 (4.80, 5.20)	5.90 (5.60, 6.30)	6.50 (6.23, 6.90)
Sepal.Width	300	3.00 (2.80, 3.30)	3.40 (3.20, 3.68)	2.80 (2.52, 3.00)	3.00 (2.80, 3.18)
Petal.Length	300	4.35 (1.60, 5.10)	1.50 (1.40, 1.58)	4.35 (4.00, 4.60)	5.55 (5.10, 5.88)
Petal.Width	300	1.30 (0.30, 1.80)	0.20 (0.20, 0.30)	1.30 (1.20, 1.50)	2.00 (1.80, 2.30)
1 Median (IQR) <br /> </p> </td> </tr>

Correct N:

tbl_summary(iris, by = Species) |> 
  add_n() |> 
  add_overall() 

Characteristic	N	Overall, N = 1501	setosa, N = 501	versicolor, N = 501	virginica, N = 501
Sepal.Length	150	5.80 (5.10, 6.40)	5.00 (4.80, 5.20)	5.90 (5.60, 6.30)	6.50 (6.23, 6.90)
Sepal.Width	150	3.00 (2.80, 3.30)	3.40 (3.20, 3.68)	2.80 (2.52, 3.00)	3.00 (2.80, 3.18)
Petal.Length	150	4.35 (1.60, 5.10)	1.50 (1.40, 1.58)	4.35 (4.00, 4.60)	5.55 (5.10, 5.88)
Petal.Width	150	1.30 (0.30, 1.80)	0.20 (0.20, 0.30)	1.30 (1.20, 1.50)	2.00 (1.80, 2.30)
1 Median (IQR) <br /> </p> </td> </tr>

^{Created on 2022-01-27 by the reprex package (v2.0.1)}

I deleted the style portion the reprex package created because it seems irrelevant for this example.

[ddsjoberg]

@brachem-christian thank you so much for the bug report and the reprex! I know exactly the update I made that results in this bug and will patch ASAP. Much appreciated!