Skip to main content

Table 3 Results of the weighted ANOVAs applied to compare the mean effect sizes obtained with the treatment and the control groups for the different outcome measures

From: Physical therapy treatments for low back pain in children and adolescents: a meta-analysis

 

95% C.I.

ANOVA

Outcome measure / Group

k

d +

d l

d u

 

Pain:

    

Q B(1) = 39.422, p < .001; R 2 = .932

Q W(14) = 17.493, p = .231

 Treatment groups

11

.800

.611

.989

 

 Control groups

5

–.194

–.440

.052

Disability:

    

Q B(1) = 6.840 p = .009; R 2 = .561

Q W(7) = 15.495, p = .030

 Treatment groups

7

.661

.353

.968

 

 Control groups

2

–.081

–.544

.382

Flexibility:

    

Q B(1) = 17.746, p < .001; R 2 = 1

Q W(5) = 4.352, p = .450

 Treatment groups

5

.500

.306

.695

 

 Control groups

2

–.211

–.479

.057

Endurance:

    

Q B(1) = 10.211, p = .001; R 2 = 1

Q W(2) = .256, p = .880

 Treatment groups

3

.628

.361

.896

 

 Control groups

1

–.149

–.545

.245

Mental Health:

    

Q B(1) = .254, p = .614; R 2 = 1

Q W(2) = 1.261, p = .532

 Treatment groups

3

.373

.141

.605

 

 Control groups

1

.488

.107

.869

Overall-Self-reports:

    

Q B(1) = 26.659, p < .001; R 2 = .401

Q W(14) = 15.724, p = .330

 Treatment groups

11

.669

.498

.840

 

 Control groups

5

–.068

–.290

.153

Overall-Clinicians:

    

Q B(1) = 6.960, p = .008; R 2 = .647

Q W(5) = 9.621, p = .087

 Treatment groups

5

.429

.161

.698

 

 Control groups

2

–.212

–.606

.181

Overall-All combined:

    

Q B(1) = 32.872, p < .001; R 2 = 1

Q W(14) = 11.375, p = .656

 Treatment groups

11

.548

.394

.702

 

 Control groups

5

–.182

–.379

.014

  1. k: number of studies for each category. d +: mean effect size for each category. d l and d u: lower and upper limits of the 95% confidence interval for the mean effect size in each category. p: probability levels for the different statistical tests. Q B: between-categories Q statistic. Q W: within-category Q statistic. R 2: proportion of variance explained by the comparison between the treatment and the control groups.