Table 4 Descriptive statistics for the discriminating variables
From: Extraction decision and identification of treatment predictors in Class I malocclusions
Treatment | N | Mean | SD | p valuea | |
|---|---|---|---|---|---|
Lower crowding | Non-extraction | 397 | -1.98 | 3.17 | 0.000 |
Extraction | 145 | -6.63 | 3.60 | ||
LL-E-plane | Non-extraction | 397 | -1.72 | 3.12 | 0.000 |
Extraction | 145 | -0.22 | 2.90 | ||
Upper crowding | Non-extraction | 397 | -1.16 | 3.78 | 0.000 |
Extraction | 145 | -5.00 | 3.79 | ||
Overjet | Non-extraction | 397 | 2.85 | 1.94 | 0.004 |
Extraction | 145 | 3.45 | 2.21 |