Thanks again Ruby for your thoughtful replies. I appreciate you clarifying specific points I have raised. There are just two further points that I wish to follow up on, if you will oblige me.
First, you mention prior research on the topic of mental health issues among JWs - I am aware of some earlier studies that were so deeply flawed that their damning findings against JW organization are unjustified such as that by "Havor Montague" (aka Jerry Bergman) whose anecdotal writings are tarted up with the language of a bona fide scientific survey. Is this the "research" you are referring to?
Secomd, whilst I think that problems do arise for those trying to leave, I think the problem also extends to active JWs who are in some way burdened by a sense of failure or crisis of faith who do NOT want to leave.
How do I know this? In my work as a clinical psychologist work ing for almost two decades in community mental health services, I get to know about referrals of people who are affiliated with a number of religious group. One of the main conclusions that I have come to is the seeming disproportionate number of referrals from individuals who are affiliated with high-control religious groups who are not seeking a way out. These groups include Exclusive Brethren, strict evangelical Christians such as those who call themselves 'the church of Christ' (note the small 'c' for church) and JWs. Are you aware of the fact thst even JWs in good standing are referred to mental health services? You say it is primarily those trying to leave but my line of work and involvement with mental health services suggests it is not just those troubled by difficulties in trying to leave.
Again, plesse note I am not saying it is worse amlng JWs but more a case of the claimed benefits of spirituality do not appear to extend to high control groups - or if they do, the positive effects are not that apparent, given the relative frequency of mental-health referrals both for those who are not expressing an intention to leave and those who are but who are troubled by the prospect of losses associated with leaving.