Table 3. Results of Analysis of Covariance on Mean Scores of Quality of Life in Posttest and Follow-up Stages.

Stages	Sum of Squares	df	Mean Squares	F	P Value
Posttest stage	284.004	1	284.004	381.37	< 0.001
Follow-up stage	283.76	1	283.76	125.61	< 0.001

Abbreviation: df, degree of freedom.