Table 5

Length of follow up of included RCTs (days)

Days of follow-up
Number of papers (%)

Not clear
105 (34.2%)
0–30
85 (27.7%)
31–90
43 (14.0%)
91–365
43 (14.0%)
366–3650
31 (10.1%)

Total
307 (100.0%)

Zhang et al. Trials 2008 9:22   doi:10.1186/1745-6215-9-22