| Middle-aged group (50–59 years) | Elderly group (≥ 60 years) | P value |
---|---|---|---|
Age | 54.13 ± 3.32 | 64.70 ± 3.93 | 0.000 |
n | 67 | 81 | – |
Gender (male/female) | 27/40 | 41/40 | – |
BMI (kg/m2) | 23.41 ± 2.79 | 23.36 ± 2.75 | 0.906 |
IgA (g/L) | 2.38 ± 0.99 | 2.59 ± 0.96 | 0.198 |
IgG (g/L) | 13.97 ± 2.38 | 14.03 ± 2.20 | 0.873 |
IgM (g/L) | 1.25 ± 0.45 | 1.16 ± 0.49 | 0.271 |