Table 2: Statistics on Standard drill v Long drill mean screw angles.
|
n |
X ± weeks |
95% CI |
P value (Standard vs. Long) |
Mean screw angle-Standard drill |
25 |
5.8 ± 1.7 |
2.3-9.3 |
|
Mean screw angle-Long drill |
34 |
2.1 ± 0.8 |
0.4-3.8 |
|
Mean screw angle-difference |
|
3.7 ± 1.7 |
0.2-7.2 |
0.037a |
Mean difference corrected for gender |
|
3.6 ± 1.7 |
0.1-7.0 |
0.042c |
Mean difference corrected for age |
|
2.0 ± 1.89 |
1.9-5.8 |
0.31c |
Mean difference corrected for side |
|
3.6 ± 1.7 |
-0.1-7.1 |
0.043c |
Max screw angle-Standard drill |
25 |
7.2 ± 1.7 |
3.7-10.7 |
|
Max screw angle-Long drill |
34 |
3.7 ± 0.9 |
1.9-5.5 |
|
Max screw angle-difference |
|
5.2 ± 0.9 |
3.4-7.0 |
0.053a |
Max difference corrected for gender |
|
3.4 ± 1.7 |
0.2-6.9 |
0.060c |
Max difference corrected for age |
|
1.6 ± 1.9 |
2.2-5.6 |
0.40c |
Max difference corrected for side |
|
3.4 ± 1.8 |
0.2-6.9 |
0.062c |
aby T test; cby linear regression
X: Mean