## Table 5 |
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Results of the multiple meta-regression on the lifetime prevalence estimates |
||||

Predictor variable |
b_{j} |
Z |
p |
Results of the full model |

Constant | −80.160 | −2.49 | .013 | |

Delimitation of pain | −0.516 | −2.05 | .041 | Q_{R}(4) = 27.24, p < .001 |

Mean age (years) | 0.029 | 0.55 | .584 | R^{2} = 0.438 |

Quality scale (0–100) | 0.005 | 0.63 | .531 | Q_{E}(25) = 1306.02, p < .001 |

Publication year | 0.040 | 2.49 | .013 |

*b*_{j}: partial regression coefficient of each moderator variable. *Z*: statistic to test the influence of each moderator variable on the prevalence rates.
*Q*_{R}: statistic to test the statistical significance of the full model. *Q*_{E}: statistic to test the model misspecification. *R*^{2}: proportion of variance accounted for by the moderator variables.

Calvo-Muñoz * et al.*

Calvo-Muñoz * et al.* *BMC Pediatrics* 2013 **13**:14 doi:10.1186/1471-2431-13-14