Table 3.
Mean within sample diversity (alpha diversity) in induced versus spontaneous sputum in COPD by different alpha diversity indices
| All samples | Exacerbation | Stable state | |||||||
|---|---|---|---|---|---|---|---|---|---|
| Diversity Indices | Induced | Spontaneous | pa | Induced | Spontaneous | pa | Induced | Spontaneous | pa |
| Faith’s Phylogenetic Diversity | |||||||||
| mean (std) | 56.9 (9.3) | 56.2 (8.6) | 0.7 | 57.3 (9.5) | 56.2 (8.8) | 0.7 | 57.1 (8.5) | 56.6 (8.4) | 0.9 |
| Chao1 | |||||||||
| mean (std) | 646.5 (116) | 638.3 (107.5) | 0.7 | 655.0 (118.5) | 642.1 (105.1) | 0.7 | 640.8 (110.4) | 643.6 (105.3) | 0.9 |
| Observed OTUs | |||||||||
| mean (std) | 543.2 (104.9) | 528.8 (106.1) | 0.6 | 552.9 (105) | 534.3 (107.1) | 0.6 | 531.6 (102.4) | 527.7 (103.2) | 0.9 |
aNon-parametric two-sample t-test using Monte Carlo permutations