Table 2 Risk of bias and funding source
| Â | Random sequence generation | Concealment of randomisation | Blinding | Loss to follow up/drop out | Method of data analysis | Jadad score (/5) | Funding |
|---|---|---|---|---|---|---|---|
DeJongste 1994 | Not stated | Independent telephone service | Open label | 8% | Not stated | 2 | Government |
DiPede 2001 | Not stated | Not stated | Blinded ECG assessment | 0% | Not stated | 3 | Not stated |
ESBY 1998 | Not stated | Not stated | Open label | 7%* | Intention to treat | 2 | Government |
Hauvast 1998 | Not stated | Not stated | Open label | 0% | Not stated | 2 | Government |
Jessurum 1999 | Not stated | Not stated | Open label | 0% | Not stated | 2 | Industry |
SPiRiT 2006 | Computer-generated | Independent R&D department | Open label | 9% | Intention to treat | 4 | Industry |
Eddicks 2007 | Not stated | Not stated | Double blind | 0% | Not stated | 4 | Industry |