They don't actually make that connection. Their final conclusion is "Rather, we believe that PPIs are important markers of hidden comorbidities that involve the damage caused by the excess stomach acid in GI tissues."
The Prilosec/Pepcid contrast was initially noted in Chinese research:
https://www.taiwannews.com.tw/en/news/3923757
The Prilosec/Pepcid contrast was initially noted in Chinese research:
https://www.taiwannews.com.tw/en/news/3923757