[R-meta] Significantly group difference, overlapping confidence intervals
fstyle71 at naver.com
Thu Feb 1 06:53:06 CET 2018
I conducted a meta analysis using the meta package.
When I did a moderator analysis using a categorial variable(with two levels) as a moderator,
I found a statistically significant moderating effect at the level of .05.
But when I looked at the 95% of confidence intervals of the two pooled effect sizes,
I found there is an overlap between the two confidence intervals.
How I can accurately interpret these two seemingly contradictory results?
Thank you for your advices in advance!
* Here I posted the results of my analysis for the moderation effects
Results for subgroups (random effects model):
k SMD 95%-CI Q tau^2 I^2
level = ele 10 0.1873 [-0.0018; 0.3764] 40.71 0.0696 77.9%
level = second 5 -0.0538 [-0.1990; 0.0915] 6.99 0.0117 42.8%
Test for subgroup differences (random effects model):
Q d.f. p-value
Between groups 3.93 1 0.0475
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