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
95% C.I. ANOVA
Outcome measure / Group k d+ dl du
Pain: QB(1) = 39.422, p < .001; R2 = .932
QW(14) = 17.493, p = .231
 Treatment groups 11 .800 .611 .989
 Control groups 5 –.194 –.440 .052
Disability: QB(1) = 6.840 p = .009; R2 = .561
QW(7) = 15.495, p = .030
 Treatment groups 7 .661 .353 .968
 Control groups 2 –.081 –.544 .382
Flexibility: QB(1) = 17.746, p < .001; R2 = 1
QW(5) = 4.352, p = .450
 Treatment groups 5 .500 .306 .695
 Control groups 2 –.211 –.479 .057
Endurance: QB(1) = 10.211, p = .001; R2 = 1
QW(2) = .256, p = .880
 Treatment groups 3 .628 .361 .896
 Control groups 1 –.149 –.545 .245
Mental Health: QB(1) = .254, p = .614; R2 = 1
QW(2) = 1.261, p = .532
 Treatment groups 3 .373 .141 .605
 Control groups 1 .488 .107 .869
Overall-Self-reports: QB(1) = 26.659, p < .001; R2 = .401
QW(14) = 15.724, p = .330
 Treatment groups 11 .669 .498 .840
 Control groups 5 –.068 –.290 .153
Overall-Clinicians: QB(1) = 6.960, p = .008; R2 = .647
QW(5) = 9.621, p = .087
 Treatment groups 5 .429 .161 .698
 Control groups 2 –.212 –.606 .181
Overall-All combined: QB(1) = 32.872, p < .001; R2 = 1
QW(14) = 11.375, p = .656
 Treatment groups 11 .548 .394 .702
 Control groups 5 –.182 –.379 .014

k: number of studies for each category. d+: mean effect size for each category. dl and du: 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. QB: between-categories Q statistic. QW: within-category Q statistic. R2: proportion of variance explained by the comparison between the treatment and the control groups.

Calvo-Muñoz et al.

Calvo-Muñoz et al. BMC Musculoskeletal Disorders 2013 14:55   doi:10.1186/1471-2474-14-55

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