Table 5 Bacterial counts for each species (fifth root-transformed) at each time point and group with between-group testing with Mann-Whitney test (*) or t test for independent samples (+), according to normality of data
Bacteria | Aligner | Bracket | Test | P | ||
|---|---|---|---|---|---|---|
S. mutans (transformed) | n | Mean (SD) | n | Mean (SD) | ||
Count at T0 | 15 | 9.44 (6.06) | 15 | 12.20 (7.24) | + | 0.27 |
Count at T1 | 15 | 8.60 (6.05) | 15 | 11.02 (7.73) | + | 0.35 |
Count at T2 | 15 | 8.87 (6.14) | 15 | 11.09 (6.71) | + | 0.35 |
L. acidophilus (transformed) | n | Median (IQR) | n | Median (IQR) | ||
Count at T0 | 15 | 0 (0–0) | 15 | 0 (0–0) | * | 1.00 |
Count at T1 | 15 | 0 (0–0) | 15 | 0 (0–0) | * | 0.76 |
Count at T2 | 15 | 0 (0–0) | 15 | 0 (0–0) | * | 0.76 |
S. sanguinis (transformed) | n | Mean (SD) | n | Mean (SD) | ||
Count at T0 | 15 | 23.93 (11.67) | 15 | 32.05 (5.24) | + | 0.02 |
Count at T1 | 15 | 21.32 (10.55) | 15 | 41.08 (10.02) | + | < 0.001 |
Count at T2 | 15 | 22.43 (9.49) | 15 | 34.75 (7.63) | + | 0.001 |