Table 3 Comparison of the alpha diversity indexes across different group of samples
Overall comparison | ||||||||||||
|  | Two Categorical GLU group | Three Categorical GLU group | Age group | Total (n = 133) | ||||||||
GLU normal (n = 78) | GLU high (n = 55) | NGR (n = 78) | IFG (n = 22) | DM (n = 33) | 76 or older (n = 45) | 75 or younger (n = 88) | min | median | max | mean | sd | |
 PD_whole_tree | 16.4 ± 4 | 16.2 ± 4.6 | 16.4 ± 4 | 16 ± 3.5 | 16.3 ± 5.3 | 16.6 ± 3.8 | 16.2 ± 4.5 | 9 | 15.8 | 30.7 | 16.3 | 4.2 |
 Chao1 | 290.3 ± 82.7 | 286.2 ± 98.3 | 290.3 ± 82.7 | 278.6 ± 92 | 291.3 ± 103.4 | 291.4 ± 81.9 | 287.2 ± 93 | 154.5 | 272.2 | 576.5 | 288.6 | 89.1 |
 Goods_coverage | 1 ± 0 | 1 ± 0 | 1 ± 0 | 1 ± 0 | 1 ± 0 | 1 ± 0 | 1 ± 0 | 1 | 1 | 1 | 1 | 0 |
 Shannon | 4.5 ± 0.8 | 4.4 ± 0.9 | 4.5 ± 0.8 | 4.4 ± 0.6 | 4.4 ± 1 | 4.4 ± 0.9 | 4.5 ± 0.8 | 2.7 | 4.5 | 6.1 | 4.4 | 0.8 |
 Simpson | 0.9 ± 0.1 | 0.9 ± 0.1 | 0.9 ± 0.1 | 0.9 ± 0 | 0.9 ± 0.1 | 0.9 ± 0.1 | 0.9 ± 0.1 | 0.6 | 0.9 | 1 | 0.9 | 0.1 |
Comparison among 76 ages and older subgroup | ||||||||||||
|  | Two Categorical GLU group | Three Categorical GLU group | Total (n = 45) | |||||||||
GLU normal (n = 26) | GLU abnormal (n = 19) | NGR (n = 26) | IFG (n = 6) | DM (n = 13) | min | median | max | mean | sd | |||
 PD_whole_tree | 17.2 ± 3.9 | 15.8 ± 3.7 | 17.2 ± 3.9 | 15.8 ± 3.7 | 15.8 ± 3.9 | 9.0 | 16.3 | 25.2 | 16.6 | 3.8 | ||
 Chao1 | 301.3 ± 81.9 | 278 ± 82.1 | 301.3 ± 81.9 | 262.7 ± 110.6 | 285 ± 69.7 | 162.3 | 272.1 | 479.5 | 291.4 | 81.9 | ||
 Goods_coverage | 1 ± 0 | 1 ± 0 | 1 ± 0 | 1 ± 0 | 1 ± 0 | 1.0 | 1.0 | 1.0 | 1.0 | 0.0 | ||
 Shannon | 4.6 ± 0.8 | 4.2 ± 0.9 | 4.6 ± 0.8 | 4.2 ± 0.8 | 4.2 ± 1 | 2.7 | 4.6 | 5.7 | 4.4 | 0.9 | ||
 Simpson | 0.9 ± 0.1 | 0.9 ± 0.1 | 0.9 ± 0.1 | 0.9 ± 0.1 | 0.9 ± 0.1 | 0.6 | 0.9 | 1.0 | 0.9 | 0.1 | ||
Comparison among 75 ages and younger subgroup | ||||||||||||
|  | Two Categorical GLU group | Three Categorical GLU group | Total (n = 88) | |||||||||
GLU normal (n = 52) | GLU abnormal (n = 36) | NGR (n = 52) | IFG (n = 16) | DM (n = 20) | min | median | max | mean | sd | |||
 PD_whole_tree | 16 ± 4 | 16.4 ± 5.1 | 16 ± 4 | 16.1 ± 3.6 | 16.6 ± 6.1 | 9.9 | 15.6 | 30.7 | 16.2 | 4.5 | ||
 Chao1 | 284.8 ± 83.3 | 290.6 ± 106.7 | 284.8 ± 83.3 | 284.6 ± 87.3 | 295.4 ± 122 | 154.5 | 274.2 | 576.5 | 287.2 | 93.0 | ||
 Goods_coverage | 1 ± 0 | 1 ± 0 | 1 ± 0 | 1 ± 0 | 1 ± 0 | 1.0 | 1.0 | 1.0 | 1.0 | 0.0 | ||
 Shannon | 4.4 ± 0.7 | 4.5 ± 0.8 | 4.4 ± 0.7 | 4.5 ± 0.5 | 4.5 ± 1 | 2.7 | 4.5 | 6.1 | 4.4 | 0.8 | ||
 Simpson | 0.9 ± 0.1 | 0.9 ± 0.1 | 0.9 ± 0.1 | 0.9 ± 0 | 0.9 ± 0.1 | 0.7 | 0.9 | 1.0 | 0.9 | 0.1 | ||