Trigger reminder on absence of comments


It looks like the "modified" column doesn't update when a comment is added to a row. Comparing this date/time value to today's date/time value is the only way I see to automate a reminder when a row has not been updated (and by updated, I mean a comment left on the row, not a cell changing).

example - remind 'assignee' to update row when modifed <= (today - 5 days))


  1. am i correct that a comment doesn't initiate an update to the modified date column?
  2. is there any other way that I can use a comment being added in a workflow condition?