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Table 2 Multivariate OLS-analysis of residual plaque in clinical and robot study – Estimated Coefficients

From: Clinical validation of robot simulation of toothbrushing - comparative plaque removal efficacy

 

Plaque (Clinical data)

Plaque (Robot data)

C (Constant)

36,13 (1945***)

29,03 (30,92***)

Π 1 (BMH)

0,01 (0,00)

−1,59 (−2,07*)

Π 2 (TBA)

6,74 (4 45***)

5,87 (7,66***)

Π 3 (LING)

3,95 (2,61**)

8,59 (11,20***)

Π 4 (ABS1)

−15,57 (−8,38*** )

−12,92 (−13,76***)

Π 5 (ABS2)

−9,92 (−5,34***)

−8,47 (−9,02***)

mean

32,98

28,33

sd

8,36

7,85

R 2

0,85

0,96

DW

1,88

2,16

BPG

3,33

2,90

  1. Explanations: Number of observations: n = 24. π 1, …, π 5 : Estimated coefficients of exogenous variables.
  2. BMH: Horizontal brushing movement, TBA: Toothbrush A, LING: Lingual site, ABS1: Incisors and canines, ABS2: premolars. t-values in parentheses. (*), (**), (***): the null hypothesis “estimated coefficient is not different from zero” can be rejected at a significance level of 10, 5 resp. 1 percent. R 2: coefficient of determination. DW: Durbin-Watson test for autocorrelation of the residuals. BPG: Breusch-Pagan-Godfrey test for heteroscedasticity.