Table 3.
Abundance of Gram-negative bacteria families between different cognitive groups.
| Gram-negative bacteria family/Group/Abundance | NC | SCD | aMCI | Corrected P value |
|---|---|---|---|---|
| Mean±Sd | Mean±Sd | Mean±Sd | ||
| f_Enterobacteriaceae | 3906.828 ± 5162.281 | 4329.840 ± 6802.138 | 4331.167 ± 5463.394 | 0.608 |
| f_Bacteroidaceae | 11606.621 ± 7432.423 | 12667.880 ± 7404.790 | 10461.889 ± 7060.471 | 0.547 |
| f_Rikenellaceae | 681.828 ± 883.525 | 312.280 ± 393.213 | 413.444 ± 413.672 | 0.094 |
| f_Acidaminococcaceae | 361.690 ± 659.419 | 428.440 ± 423.626 | 351.778 ± 526.154 | 0.281 |
| f_Christensenellaceae | 412.931 ± 509.903 | 67.680 ± 161.526 | 84.278 ± 248.961 | 0.039* |
| f_Prevotellaceae | 4106.000 ± 7954.082 | 4552.600 ± 8914.859 | 1172.500 ± 2563.799 | 0.588 |
| f_Veillonellaceae | 1163.828 ± 1335.407 | 673.880 ± 857.377 | 838.167 ± 1362.374 | 0.503 |
| f_Desulfovibrionaceae | 71.793 ± 79.112 | 71.640 ± 81.995 | 40.611 ± 30.805 | 0.688 |
| f_Fusobacteriaceae | 28.586 ± 128.120 | 82.800 ± 371.677 | 76.889 ± 316.546 | 0.818 |
| f_Alcaligenaceae | 0.759 ± 1.976 | 0.120 ± 0.332 | 0.111 ± 0.471 | 0.055 |
| f_porphyromonadaceae | 3121.724 ± 4593.482 | 4071.040 ± 5112.378 | 1751.722 ± 1894.365 | 0.212 |
| Total Gram-negative bacteria families | 25462.586 ± 10339.181 | 27258.200 ± 9642.427 | 19522.556 ± 7200.040 | 0.047* |
The unit of the mean was abundance; Sd meant standard deviation. The Gram-negative bacteria families different significantly among three groups were listed in the above table. We applied non-parametric rank sum test in the analysis of abundance of Gram-negative bacteria families between three groups. * shows P < 0.05.