Czas niechirurgicznego leczenia endodontycznego z użyciem lub bez użycia lupy
The results of this study showed that the treatment time was associated with the clinical trial centre, root canal system, presence of preoperative pain, treatment visit, the use of a magnifying loupe, and the experience of the operator. The dentists at the PKU clinical centre were remunerated by the number of items performed, whereas those in the HKU clinical centre were compensated with a fixed salary. This compensation format can explain the difference in treatment time between the two centres. Lo et al. reported that the remuneration system would affect the clinician’s performance [11]. Chu et al. also found that salary-based dentists spent more time communicating with patients than those who were paid by the item (i.e., who tend to perform faster than average dentists) [12].
During data analysis, neutral logarithmic transformation is a common method for manipulating the outlying data from a positively skewed distribution to one that is closer to the bulk of the data to allow the variable to be normally distributed [13]. In this study, using a model in which the outcome variable has been log-transformed and the predictors have not, it is natural to interpret the exponential function of the ANCOVA coefficients. In terms of (simplified) equations, the model with log-transformed outcome variable is
logY = β∩ + ∑kiβiXi
for k independent variables and thus
Y = eβO [...]
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