diff --git a/plots/model_ext_validation_files.m b/plots/model_ext_validation_files.m
index 661fe86..1ec6ee3 100644
--- a/plots/model_ext_validation_files.m
+++ b/plots/model_ext_validation_files.m
@@ -59,6 +59,7 @@
         if ia == 1 % all patients
             approach(ia).type = 'all patients';
             approach(ia).nums= [];
+            approach(ia).sleep_info = [];
             
         else % good outcome only
             approach(ia).type = 'For HUP patients, only allow bilateral or unilateral good outcome (Engel 1)';