Truly there are additional security concerns one should have because of having sliding glass doors as opposed to regular doors. Just the way the doors open and lock, make them different from regular doors, and they have been proven to be easier to penetrate than normal doors. For example, it is known that the doors can be lifted out of the frame if not secured properly, with perhaps double point locks.

However, if adequate security measures are taken, they can be just as secure if not moreso than your regular doors. So one must know what security measures can and should be taken.  Therefore one should do a little research to bridge this knowledge gap. There are actually a number of precautions you can implement yourself. I recommend the article Sliding Glass Door Security Techniques as a starting point.

Related posts:

1. Improving Lighting And More With Sliding Glass Doors
2. Double Pane Windows -An Introduction
3. Triple Pane Windows -What To Know