Yes I wouldn't be surprised at all. It's easy to see how much lower suicide rates are for example in so called "third world" countries that have been war torn, due to no small part by Western colonialism, compared to "advanced first world" countries, which are generally highly secular and have higher standards of living. Believing in God plays a major role in maintaining mental sanity, particularly in the faces of challenges.

Personally speaking, Islam has helped me and many others I have either personally observed or heard about navigate far from ideal circumstances. I've known people who have lost spouses, children, or even entire close families, yet they remain steadfast and strong.