The culture of the American church and youth ministry have changed a bit since 2011 when this article was first published. But I think Jon Nielson observations are still important. The reasons youth stay in church through college and into adulthood are:

 

1. They are converted

2. They have been equipped, not entertained

3. Their parents preached the gospel to them

 

In summary he writes

“Youth pastors, pray with all your might for true conversion; that is God’s work. Equip the saints for the work of the ministry; that is your work. Parents, preach the gospel and live the gospel for your children; our work depends on you.”

 

read the full article here.