Table II.
Results of quality assessment of six randomized controlled trials.
| First author, year (ref) | Allocation concealment | Blinding | Randomization | Percentage that completed the trial | Intention- to-treat analysis | Free of selective reporting | Groups comparable at baseline |
|---|---|---|---|---|---|---|---|
| Nauck, 2007 (16) | Yes | Yes, double blind | Computer-generated allocation schedule | 68 | Yes | Yes | Yes |
| Arechavaleta, 2011 (14) | Yes | Yes, double blind | Computer-generated allocation schedule | 90 | Yes | Yes | Yes |
| Srivastava, 2012 (18) | Unclear | Unclear | Computer-generated random number | 100 | No | Yes | Yes |
| Seck, 2010 (17) | Yes | Yes, double blind | Computer-generated allocation schedule | 43 | Yes | Yes | Yes |
| Li, 2012 (20) | Unclear | Unclear | Random number table | 100 | No | Yes | Yes |
| Koren, 2012 (19) | No | Open-label crossover trial | Recruitment order | 85 | Yes | Yes | Yes |