Table 2.

Summary of findings

Figure	Pair of scales		Number of studies	Difference between MD values from scales following rescaling	Study weighting/confidence intervals
Figure 2	0 to 10	0 to 100	1	0.8 points out of 100	0 to 10 scale contributed 10–14% more weight
Figure 3	0 to 10	0 to 3 (4-point)	3	0.2 points out of 100 (range 5.5 points lower to 2.7 points higher)	0 to 3 scales contributed an average of 5.4% less weight (range 12% less to 12% more)
Figure 4	0 to 100	0 to 3 (4-point)	2	0.7 points out of 100 (range 6.2 points lower to 12.1 points higher)	0 to 3 scales contributed an average of 30.7% less weight (range 56% less to 10% more)
Figure 5	0 to 100	0 to 4 (5-point)	6	0.7 points out of 100 (range 5.4 points lower to 8.3 points higher)	0 to 4 scales contributed an average of 17% less weight (range 50% less to 18% more)