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Table 3 Analysis of covariance to adjust the pretest scores as a variable covariate

From: The effectiveness of a model-based health education program on genital warts preventive behaviors: a quasi-experimental study

Variables Source Sum of squares df Mean square F-value p value Partial eta squared
Awareness Pretes .093 1 .093 .040 .842 .000
Posttest 367.613 1 367.613 157.634 < .001 .517
Error 342.814 147 2.332    
R Squared = .518 (Adjusted R Squared = .511)
Perceived susceptibility Pretest 88.273 1 88.273 9.002 .003 .058
Posttest 2091.104 1 2091.104 213.239 < .001 .592
error 1441.541 147 9.806    
R Squared = .603 (Adjusted R Squared = .598)
Perceived severity Pretest 8.403 1 8.403 1.639 .203 .011
Posttest 824.284 1 824.284 160.754 < .001 .522
error 753.757 147 5.128    
R Squared = .524 (Adjusted R Squared = .518)
Perceived benefits Pretest .000 1 .000 .003 .960 .000
Posttest 4.851 1 4.851 33.639 < .001 .186
error 21.200 147 .144    
R Squared = .187 (Adjusted R Squared = .175)
Perceived barriers Pretest 397.798 1 397.798 21.760 < .001 .129
Posttest 1243.343 1 1243.343 68.014 < .001 .316
error 2687.269 147 18.281    
R Squared = .373 (Adjusted R Squared = .364)
Self-efficacy Pretest 130.137 1 130.137 35.323 < .001 .194
Posttest 280.681 1 280.681 76.186 < .001 .481
error 302.570 147 3.684    
R Squared = .461 (Adjusted R Squared = .433)
Behavior Pretes .055 1 .055 .115 .735 .001
Posttest 45.524 1 29.094 61.100 < .001 .394
error 69.999 147 .476    
R Squared = .403 (Adjusted R Squared = .384)