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Progress in Orthodontics

Table 4 Descriptive statistics and significance probabilities of horizontal and vertical variables

From: Analysis of pretreatment factors associated with stability in early class III treatment

 

Total

Stable

Unstable

U test

n

X

IQR

n

X

IQR

n

X

IQR

p

Horizontal

72

1.43

1.73

53

1.00

1.35

19

2.50

2.10

.000*

Vertical

50

1.75

1.98

40

1.63

1.65

10

2.88

4.49

.326

  1. Mann-Whitney’s U test between the stable group and the unstable group (Statistical powers were .840, and .581, respectively; Effect size d =0.8) (x median, IQR interquartile range, *: p < .05)
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