ALB and diabetes mellitus: Hyperuricemia was associated with a reduced risk of MCI in individuals aged <70 years (OR = 0.29, 95% CI = 0.12–0.61, p = 0.003), males (OR = 0.34, 95% CI = 0.14–0.74, p = 0.010), those with a BMI <25 (OR = 0.17, 95% CI = 0.04–0.49, p = 0.004), those without hypertension (OR = 0.23, 95% CI = 0.05–0.72, p = 0.024), those without diabetes mellitus (OR = 0.43, 95% CI = 0.22–0.77, p = 0.007), and those with albumin levels <40 g/L (OR = 0.27, 95% CI = 0.07–0.78, p = 0.026) (Figure 2B).