Table 3 Descriptive statistics regarding the survival rate of different retainer wires in the maxilla
Retainer | Time at risk | Event observed | Incidence rate | No. of subjects | Survival time | P value† | ||
|---|---|---|---|---|---|---|---|---|
25% | 50% | 75% | ||||||
Retainium | 755 | 22 | .029 | 34 | 12 | 24 | 0.432 | |
Orthoflex | 740 | 29 | .039 | 40 | 6 | 24 | 46 | |
Bond-A-Braid | 719 | 31 | .043 | 41 | 6 | 12 | 24 | |
Total | 2214 | 82 | .037 | 115 | 6 | 24 | 46 | |