Earlier quoted context omitted.
Has there been any change in the rate of depression or other mental disorders in minors, and if so, is loss of autonomy one of the factors in this?
It is hard to say, since we diagnose more then before. Anecdotally, some say that yes there is such rise. Then again, teenagers are now less violent then before, commit less serious crime, get pregnant less often and take drugs less. It is hard to weight those against each other.
And I'd also wager that the number of kids negatively impacted by poor mental health today is a lot more than the number of kids negatively impacted by violent youth crime and teenage pregnancies in past years not so far removed from our own.
Furthermore we've got a baby/bathwater situation going on here specifically with respect to teenage pregnancy as it relates to minor autonomy. Teaching kids to use condoms and birth control needn't be thrown out with the bathwater that is overprotected children. In fact, I think you could argue that sex education for minors is an exception to the rule, where minors are being given more autonomy today than in the past.