list of recent thread opened only by admin

[pompaunpo]

How do I do to see on an external page (my home site) the list of recent thread opened only by admin?
I have written
$query = "SELECT * FROM thread WHERE postuserid ='1' ORDER BY dateline DESC LIMIT 10";

but displays not the last 10 recent thread opened by admin but

if there is a recent user reply in an old thread opened by admin (even older than one year)
also displays the old thread