|
Piecewise Linear Model with knot at Time = 1 |
|
Treatment of Lead Exposed Children (TLC) Trial |
|
The Mixed Procedure |
|
Model Information |
|
|
Data Set |
WORK.TLC |
|
Dependent Variable |
y |
|
Covariance Structure |
Unstructured |
|
Subject Effect |
id |
|
Estimation Method |
REML |
|
Residual Variance Method |
None |
|
Fixed Effects SE Method |
Model-Based |
|
Degrees of Freedom Method |
Between-Within |
|
Class Level Information |
||
|
Class |
Levels |
Values |
|
id |
100 |
not printed |
|
t |
4 |
0 1 4 6 |
|
Dimensions |
|
|
Covariance Parameters |
10 |
|
Columns in X |
5 |
|
Columns in Z |
0 |
|
Subjects |
100 |
|
Max Obs Per Subject |
4 |
|
Observations Used |
400 |
|
Observations Not Used |
0 |
|
Total Observations |
400 |
|
Iteration History |
|||
|
Iteration |
Evaluations |
-2 Res Log Like |
Criterion |
|
0 |
1 |
2643.53129229 |
|
|
1 |
2 |
2437.45408762 |
0.00000197 |
|
2 |
1 |
2437.45239023 |
0.00000000 |
|
Convergence criteria met. |
|
Estimated R Matrix for id 1 |
||||
|
Row |
Col1 |
Col2 |
Col3 |
Col4 |
|
1 |
24.9923 |
18.9222 |
19.3763 |
22.1331 |
|
2 |
18.9222 |
44.2021 |
35.3398 |
29.5616 |
|
3 |
19.3763 |
35.3398 |
47.9416 |
29.5428 |
|
4 |
22.1331 |
29.5616 |
29.5428 |
59.5855 |
|
Fit Statistics |
|
|
-2 Res Log Likelihood |
2437.5 |
|
AIC (smaller is better) |
2457.5 |
|
AICC (smaller is better) |
2458.0 |
|
BIC (smaller is better) |
2483.5 |
|
Solution for Fixed Effects |
|||||
|
Effect |
Estimate |
Standard Error |
DF |
t Value |
Pr > |t| |
|
Intercept |
26.3422 |
0.4991 |
99 |
52.78 |
<.0001 |
|
time |
-1.6296 |
0.7818 |
99 |
-2.08 |
0.0397 |
|
time_1 |
1.4305 |
0.8777 |
99 |
1.63 |
0.1063 |
|
time*succimer |
-11.2500 |
1.0924 |
99 |
-10.30 |
<.0001 |
|
time_1*succimer |
12.5822 |
1.2278 |
99 |
10.25 |
<.0001 |