The person using code 10/11 may choose to specify the cause of the anxiety.'10/11 related to this new product launch.'
'10/11 over this sexual harassment case.'
'10/11 with regard to the inquiry.'
'10/11 about the competitor's response to our sales push.'

Anxiety is a natural state of mind provided it is not exaggerated, sustained or too frequent.

Any person, no matter how experienced, feels some anxiety about going on stage. Without this anxiety the performance can be dead.