Can I disable right sidebar when on a cat page which has subcats?

[dremhmrk2]

I would like my right hand side bar to NOT show up when you are on a category page which lists sub categories.

I currently am able to hide the sidebox on the index page using:

 if ($this_is_home_page == true) { 
$flag_disable_right = true;
$flag_disable_left = false;
}

I have been trying to hide subcats using this code:

// the following IF statement can be duplicated/modified as needed to set additional flags
if ($current_page_base == 'cPath=175') {
     $flag_disable_right = true;
  }

But it's not hiding them.

Any help would be greatly appreciated!