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