Variable

Regression Coefficient

SE

t value

df

p value

Pruning Severity

−0.72

0.08

−8.07

23.1

0.00

Age

−0.09

0.27

−0.32

16.5

0.76

Pretreatment Crown Size

80% Live Crown

−8.65

10.93

−0.79

22.2

0.44

90% Live Crown

−5.70

10.07

−0.57

23.1

0.58

Fully Crowned

−13.79

5.74

−2.40

22.3

0.03

Open−grown

−14.91

7.76

−1.92

22.8

0.07