Table 1.
Descriptive statistics of conditions during therapy including ABO scores
| Total | Group 1 | Group 2 |
p Values (1–2) |
Effect size | |
|---|---|---|---|---|---|
| Patients [n (%)] | 38 (100) | 18 (47.4) | 20 (52.6) | ||
| Sex [n (% of total)] | |||||
| Male | 15 (39.5) | 8 (21.1) | 7 (18.4) | 0.741a | 0.097c |
| Female | 23 (60.5) | 10 (26.3) | 13 (34.2) | ||
| Age at the start of treatment (years) | 14.3 [12.4; 22.2] | 14.3 [13.1; 18.5] | 14.3 [12.4; 22.2] | 0.696b | 0.044d |
| Little Irregularity Index | 3.6 [0.5; 13.0] | 4.7 [0.5; 8.0] | 2.7 [1.6; 13.0] | 0.051b | 0.438d |
| Treatment time (months) | 16.7 [10.1; 35.2] | 16.7 [13.0; 30.1] | 16.8 [10.1; 35.26] | 0.654b | 0.084d |
| Number of brackets lost | 1.0 [0; 19] | 2.0 [0; 19] | 1 [0; 3] | 0.035b | 0.813d |
| Number of brackets repositioned | 0 [0; 10] | 0 [0; 5] | 0.5 [0; 10] | 0.024b | 0.611d |
| Number of archwires | 4.5 [3; 6] | 6 [3; 6] | 4 [3; 6] | < 0.001b | 1.3d |
| Number of archwire bends | 2.5 [0; 14] | 2 [0; 5] | 5 [0; 14] | 0.093b | 0.789d |
| Number of appointments | 15.0 [8; 28] | 16.5 [10; 28] | 14 [8; 25] | 0.082b | 0.494d |
| ABO scores before treatment | 46 [30; 62] | 46 [30; 62] | 48 [32; 62] | 0.874b | 0.105d |
| ABO scores after treatment | 13 [3; 24] | 12 [3; 23] | 16 [7; 24] | 0.133b | 0.442d |
| ABO score change within treatment | 32 [16; 53] | 32 [20; 53] | 32 [16; 48] | 0.806b | 0.248d |
If not otherwise stated, median and range [minimum; maximum] were reported including effect sizes. The Mann–Whitney U test was applied to compare both groups: group 1 (individualized CAD/CAM system) and group 2 (conventional self-ligating system)
aFisher’s exact test, bexact significance Mann–Whitney U test, cCohen’s w, dCohen’s d