Table 1 Descriptive statistics for survival time (month) in the study groups
Groups | Mean ± SE | SD | Min | Max | 95% Confidence interval |
|---|---|---|---|---|---|
Multi-stranded retainers (maxilla) | 15.34 ± 0.47 | 4.04 | 4 | 18 | 14.41-16.26 |
Multi-stranded retainers (mandible) | 15.61 ± 0.42 | 3.61 | 5 | 18 | 14.79-16.43 |
Ribbon retainer (maxilla) | 13.96 ± 0.55 | 4.53 | 3 | 18 | 12.87-15.04 |
Ribbon retainer (mandible) | 14.26 ± 0.57 | 4.70 | 4 | 18 | 13.14-15.39 |