Abbreviated Interrupted Time-Series - Institute for Policy Research
Abbreviated Interrupted Time-Series - Institute for Policy Research
Abbreviated Interrupted Time-Series - Institute for Policy Research
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Comparing Models<br />
Stuart (1967) – Actual Data<br />
Linear Model Prediction (HLM)<br />
215.7<br />
226.2<br />
196.2<br />
203.3<br />
POUNDS<br />
180.5<br />
POUNDS<br />
176.7<br />
157.2<br />
157.7<br />
134.8<br />
-12.60 -9.30 -6.00 -2.70 0.60<br />
MONTHS12<br />
137.8<br />
-12.00 -9.00 -6.00 -3.00 0<br />
MONTHS12<br />
Quadratic Model Prediction (HLM)<br />
219.2<br />
199.1<br />
• Even graphically, the quadratic<br />
model looks to be a better fit to the<br />
original data.<br />
POUNDS<br />
179.0<br />
158.8<br />
138.7<br />
-12.00 -9.00 -6.00 -3.00 0<br />
MONTHS12<br />
• Patients lost weight at a faster rate<br />
at the beginning of treatment and<br />
at a slower rate towards the end of<br />
the one-year treatment.