S100A8 and hematocrit: A meta-analysis of 15 articles that included 3,046 cases showed that H. pylori was positively correlated with HT and GD (HT: 95% CI: 1.44–3.23, OR = 2.16; GD: 95% CI: 1.68–4.61, OR = 2.78), and CagA+ H. pylori was positively related to AITD (95% CI: 1.07–3.70, OR = 1.99) (Hou et al., 2017).