Table 2. Alpha diversity measures.
| Alpha-Diversity Indexes | Abstinent (AB, N = 10) | Current Drinkers (CD, N = 9) | Healthy Controls (HC, N = 12) | Kruskal-Wallis | P-value |
|---|---|---|---|---|---|
| Observed ASVs | 137 (24.32) | 175 (40.81) | 171 (30.95) | H = 7.263 | .026 |
| Chao1 | 139 (25.22) | 184 (44.88) | 177 (31.90) | H = 8.835 | .012 |
| Shannon | 3.87 (0.24) | 4.05 (0.38) | 3.96 (0.28) | H = 1.954 | .376 |
| Simpson | 0.96 (0.01) | 0.963 (0.02) | 0.961 (0.01) | H = 0.936 | .626 |
Means and standard deviations (SDs) are shown for each alpha-diversity index. Kruskal-Wallis (H) test was used to compare the median of each index among the three study groups, i.e., abstinent (AB) current drinkers (CD), and healthy controls (HC). p < .05 shown in bold. Abbreviations: ASV = Amplicon Sequence Variant; SD = Standard Deviation.