From page 4: The research presented instagram users with a survey about a select negative experience they may have had. Only if the user reported having had such an experience did they get a random "deep dive" ...
So the "reported" here just mean answered a previous question and does not precede using Instagram or smoking.
Looking at the data : https://about.fb.com/wp-content/uploads/2021/09/Instagram-Te...
From page 4: The research presented instagram users with a survey about a select negative experience they may have had. Only if the user reported having had such an experience did they get a random "deep dive" ...
So the "reported" here just mean answered a previous question and does not precede using Instagram or smoking.