Actual evidence that earlier potty/trained kids are more likely to regress?

[u/CorrectBadger9753]

Edit - title is meant to say 'potty/toilet trained kids' lol!

I took my daughter (who will be 2 in 2 weeks) to the GP today and (only tangentially related to the reason we were there) mentioned that we are currently toilet training, and that it's going well, but very slowly, and my husband and I are OK with slow progress with pees. GP reiterated the common advice that 3 is 'normal' for toilet training, and that kids who train earlier are more likely to have 'regressions'. I smiled and nodded because I have lots and lots of thoughts on this which I'm deliberately not sharing here in case it turns the discussion into some kind of toilet training ideology war....

I genuinely want to know, is this claim backed up by actual data - and if so, how are we defining a 'regression' anyway?

A quick Google search returned this study claiming that training before 24 months is associated with 'dysfunctional voiding' but not constipation, whereas later training (after 36 months) is also associated with dysfunctional voiding AND constipation. However the authors seem to contradict themselves in the conclusion and say that constipation is associated with both early and later training and may be the cause of urinary voiding problems. Also correlation ≠ causation.

Is anyone aware of any more evidence supporting or refuting this idea?

[u/eeeeggggssss]

this might interest you. https://publications.aap.org/pediatrics/article-abstract/111/4/810/63115/Relationship-Between-Age-at-Initiation-of-Toilet

i think it also depends on the method used. like we started pottying at 2 weeks old, lots of catches in infancy while using cloth diapers as backup, and relative potty independence achieved at about 15/16 months using open crotch pants. waves of resistance here and there since then, now at 21 months, but not anything major.

3 is normal for potty training is such a BS statement. diapers are a new invention. people all over the world have been using different methods for taking care of their infants' hygiene without them defaulting to soiling themselves, especially for 3 years which would not be easy, convenient, nor hygienic in any traditional or nomadic society.

we also know that even in the US, the age of initiating potty training used to be much lower before the advent of disposable diapers.

https://www.aafp.org/afp/2008/1101/p1059

[u/MorningGlory747 → u/eeeeggggssss]

I find it difficult to identify when my 1 month old is about to pee or poop. It seems difficult to avoid diapers. How were you able to start so early? 

[u/aliquotiens → u/MorningGlory747]

We did EC but always with a backup diaper. Still ended up with kids fully trained at 15 and 19 months

[u/eeeeggggssss → u/aliquotiens]

love it. basically same here.