GHRL and Atrophy: Subgroup analysis showed that the mean differences in serum ghrelin for mild, moderate, and severe atrophy were -78.85 (95% CI: -165.17, to 7.48), -91.97 (95% CI: -183.11, to -0.84), and -110.67 (95% CI: -204.77, to -16.56), respectively.