Table 6

Analysis of covariance of perceived benefit, perceived barrier, self-efficacy, and FV consumption

Source of variance

Type III sum of square

df.

Mean square

F statistic

P


Perceived Benefit


Arm

6846.086

1

6846.086

179.074

< 0.0001


Pretest

15388.664

1

15388.664

402.523

< 0.0001


Age

14.127

1

14.127

0.37

0.544


Education

11.286

1

11.286

0.295

0.587


Marital status

77.527

1

77.527

2.028

0.155


Income

65.055

1

65.055

1.702

0.193


Chronic disease

50.452

1

50.452

1.32

0.251


BMI

41.750

1

41.750

1.092

0.297


Error

14948.144

391

38.231


Perceived Barrier


Arm

5423.038

1

5423.038

174.115

< 0.0001


Pretest

13877.096

1

13877.096

455.545

< 0.0001


Age

38.961

1

38.961

1.251

0.264


Education

80.167

1

80.167

2.574

0.109


Marital status

19.014

1

19.014

0.61

0.435


Income

50.268

1

50.268

1.614

0.205


Chronic disease

2.029

1

2.029

0.065

0.799


BMI

0.172

1

0.172

0.006

0.941


Error

12178.223

391

31.146


Self-efficacy


Arm

3252.374

1

3252.374

475.144

< 0.0001


Pretest

9563.134

1

9563.134

1.397

< 0.0001


Age

23.900

1

23.900

3.492

0.062


Education

5.188

1

5.188

0.758

0.385


Marital status

1.006

1

1.006

0.147

0.703


Income

30.368

1

30.368

4.436

0.036


Chronic disease

1.022

1

1.022

0.149

0.699


BMI

0.282

1

0.282

0.041

0.839


Error

2676.407

391

6.845


FV consumption


Arm

156.226

1

156.226

294.929

< 0.0001


Pretest

218.617

1

218.617

412.712

< 0.0001


Age

2.400

1

2.400

4.530

0.034


Education

0.017

1

0.017

0.032

0.858


Marital status

1.301

1

1.301

2.456

0.118


Income

0.055

1

0.055

0.105

0.746


Chronic disease

0.198

1

0.198

0.374

0.541


BMI

0.062

1

0.062

0.118

0.732


Error

207.116

391

0.530


Salehi et al. Nutrition Journal 2011 10:123   doi:10.1186/1475-2891-10-123

Open Data