meta reg moderator

[Tommaso Salvitti]

Hi to everybody,
i'm doing a metanalysis.
I'm using the percentage of women as a moderator. I have attached the output of the meta regress txt file "Gastrointestinal" and the graph "prova".
Why is it that even if the confidence intervals are not negative, in the graph, the y-axis starts from -2? Thanks to everybody

[Tommaso Salvitti]

meta regress Age

  Effect-size label: Prevalence ASD with Gastrointestinal Disorder
        Effect size: prev_gastrodisorder
          Std. err.: se_prev_gastrodisorder

Random-effects meta-regression                      Number of obs  =        17
Method: REML                                        Residual heterogeneity:
                                                                tau2 =  .01855
                                                              I2 (%) =   99.49
                                                                  H2 =  197.67
                                                       R-squared (%) =   42.93
                                                    Wald chi2(1)   =     12.41
                                                    Prob > chi2    =    0.0004
------------------------------------------------------------------------------
    _meta_es | Coefficient  Std. err.      z    P>|z|     [95% conf. interval]
-------------+----------------------------------------------------------------
         Age |   .0059134   .0016783     3.52   0.000      .002624    .0092028
       _cons |   .1023983   .0543449     1.88   0.060    -.0041158    .2089123
------------------------------------------------------------------------------
Test of residual homogeneity: Q_res = chi2(15) = 1083.06 Prob > Q_res = 0.0000