She decided not to think about it; needless worry wouldn't help.

Because I can't stand to see a bunch of needless worries steal away your happiness.

I don't mean to cause you needless worry or discomfort.

Or is something causing needless worry in your life?

All those hours of needless worry on her part.

"You really believe she'd purposely cause her family that kind of needless worry?"

And it may cause needless worry that something is wrong.

No intention of any sort, except perhaps to spare you needless worry.

A needless worry, as it turned out; he was there the very next evening.

The most common risk of the tests is needless worry.