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Table 3 Comparison of mean friction generated at lingual brackets ( p < 0.05)

From: Frictional resistance exerted by different lingual and labial brackets: an in vitro study

Bracket (I) Bracket (J) Mean difference (I-J) Std. error Sig. 95% Confidence interval
Lower bound Upper bound
A1 A2 1.5383333 .8037706 .749 -1.102888 4.179554
A3 3.6308333- .8037706 .004 .989612 6.272054
A4 2.9333333- .8037706 .024 .292112 5.574554
A5 2.4091667 .8037706 .090 -.232054 5.050388
A2 A1 -1.5383333 .8037706 .749 -4.179554 1.102888
A3 2.0925000 .8037706 .200 -.548721 4.733721
A4 1.3950000 .8037706 1.000 -1.246221 4.036221
A5 .8708333 .8037706 1.000 -1.770388 3.512054
A3 A1 -3.6308333- .8037706 .004 -6.272054 -.989612
A2 -2.0925000 .8037706 .200 -4.733721 .548721
A4 -.6975000 .8037706 1.000 -3.338721 1.943721
A5 -1.2216667 .8037706 1.000 -3.862888 1.419554
A4 A1 -2.9333333- .8037706 .024 -5.574554 -.292112
A2 -1.3950000 .8037706 1.000 -4.036221 1.246221
A3 .6975000 .8037706 1.000 -1.943721 3.338721
A5 -.5241667 .8037706 1.000 -3.165388 2.117054
A5 A1 -2.4091667 .8037706 .090 -5.050388 .232054
A2 -.8708333 .8037706 1.000 -3.512054 1.770388
A3 1.2216667 .8037706 1.000 -1.419554 3.862888
A4 .5241667 .8037706 1.000 -2.117054 3.165388