Repeated ear infections absolutely are known to be associated with CAPD. There must be studies behind this because I've seen it said again and again. It came up a lot when I was researching this for DD (who had terrible issues with ear infections and has symptoms of CAPD, but tested as absolutely not having it and has perfect hearing today). Ear infections are also known to be associated with speech problems, of course.

FWIW, DD has beautiful handwriting, is great at arithmetic, and has an amazing rote memory, and her writing skills are great. But...she doesn't hear people a lot of the time and doesn't seem to process oral directions well. I don't even know.

DD had 40% hearing loss in one ear for a significant period as a toddler. I HAVE to think that did something not-good.