I've read some, but not all of this thread (dealing with an ill DD), so apologies if this has been mentioned elsewhere.
I'm interested to know which outcomes are measured in these type of studies and how they are measured. Clearly it's not just about mortality, it's also about morbidity. But what is measured, how is it measured, and when is it measured? A data collection point 1, 3, even 6 months after giving birth may not be long enough to capture the true picture of what is going on for that individual.
In my case (1st timer, MLU transferring to CLU, epidural, medium bleed, 2nd degree tear), the full extent of the damage (cystocele, rectocele, enterocele, uterine prolapse, displaced coccyx, severe trauma to pelvic bones, detached puborecalis) and the toll on my health (PTSD, double incontinence, pain, infection, mobility problems) has only become apparent as the months, and indeed years, have gone by. The labour unit where I gave birth is, as far as I can deduce, not aware of any of this, as nothing has yet to come to light when I was discharged from the CM service. None of this will show up in their data, internal audits, whatever, and my birth which was a catastrophe for me, I assume, is categorised as having a pretty good outcome.
I can't imagine that this just applies to me - birth injuries often take some time to reveal themselves.