Meta-Analysis Graphs

1
Meta-Analysis Graphs

• Funnel Forest Plots

2
Funnel Plot
Notice central tendency spread. Note funnel
shape. Note too many on the high side? Note
variability of small N studies.
3
Forest (Dot) (Time) Plot
studyid lower r upper min
max

-0.491919052
0.4914054249
--------------------------------------------
-------- 9 -0.49 -0.16 0.21
------------------------0----------
18 -0.23 -0.03 0.17
----------0--------
2 -0.21 0.00 0.21
--------------------
8 -0.12 0.00 0.12
------------
10 -0.21 0.00 0.21
--------------------
19 -0.14 0.00 0.14
--------------
16 -0.12 0.03 0.18
-----0------- 20
-0.19 0.03 0.24
---------0----------- 7
-0.04 0.07 0.18
-0-------- 11
-0.07 0.08 0.22
--0---------- 6
-0.10 0.10 0.29
----0------------- 17
-0.01 0.11 0.23
0---------- 5
-0.18 0.15 0.45
---------0---------------------- 15
0.01 0.19 0.36
----------------- 4
0.07 0.21 0.34
0 ------------ 12
0.06 0.21 0.35
0 -------------- 3
-0.01 0.24 0.47
0----------------------- 14
-0.01 0.26 0.49
----------------------- 1
0.08 0.29 0.47
0 ------------------- 13
0.22 0.33 0.43
0 ---------
-----------------------
-----------------------------
Note zero point. Look for gaps, notice which are
significantly different from zero. Can also show
overall (weighted mean) effect size and
confidence interval.