diff --git a/R/input-comparison.R b/R/input-comparison.R
index bb30d6c7..c7645cc0 100644
--- a/R/input-comparison.R
+++ b/R/input-comparison.R
@@ -134,10 +134,9 @@ prepare_anc_spectrum_comparison <- function(anc, shape, pjnz) {
   dat |>
     dplyr::mutate(
       sex = "female", age_group = "Y015_049",
-      group = "anc_adult_female",
-      difference = value_spectrum - value_naomi) |>
+      group = "anc_adult_female")
     dplyr::select(indicator, area_name, year, group,
-                  value_spectrum, value_naomi, difference)
+                  value_spectrum, value_naomi)
 
 }