Table 8

Results of the mixed-effects ANOVA for the qualitative moderator variable “research team” on the effect sizes obtained from measures of knowledge in the posttest
Research team k d+ 95% C. I. ANOVA results
dl du
Cardon, Geldhof et al. (Belgium) 6 0.901 0.541 1.261 QB(5) = 26.49, p < .001
Gómez, Méndez et al. (Spain) 4 2.043 1.600 2.485 R2 = 0.718
Spence et al. (USA) 2 1.450 0.681 2.219 QW(10) = 71.28, p < .001
Vidal et al. (Spain) 1 0.469 −0.388 1.327
Park & Kim (South Korea) 2 1.739 0.985 2.492
Kovacs et al. (Spain) 1 0.289 −0.516 1.094

k: number of studies. d+: mean effect size. dl and du: lower and upper confidence limits of the 95% confidence interval around the mean effect size. QB: statistic for testing the significance of the moderator variable. QW: statistic for testing the model misspecification. R2: proportion of variance accounted for by the moderator variable.

Calvo-Muñoz et al.

Calvo-Muñoz et al. BMC Musculoskeletal Disorders 2012 13:152   doi:10.1186/1471-2474-13-152

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