Table 4.

Treatment Means: 2006 and Current Analysis Stratified by Follow-up Duration

Follow-up Duration	2006 Estimate	Current Estimate
0–3 month (36, 38)	3.88	4.17
4–12 month (21, 29)	2.92	4.06
> 12 month (5, 8)	6.62	6.78

Note. The information in parentheses indicates the number of studies in 2006 and then the current analysis. Moolchan et al. (2005) had a 3 month follow-up but this study is not included in this table's current estimate because it had not included a standard care control condition.