Statistical analyses
tooth
REGRESSION
Continuous variables are represented as median (1st–3rd quartile) because of asymmetric data distributions. To compare stability values between the treatment groups, mixed models were used on three levels, namely person, tooth site, and time as continuous variable [The Kaplan–Meier analyses were performed as descriptive statistics assuming independent observations. However, the Cox regression considered dependence among implants from the same patient by robust variances [