2000 | 2008 | |||||||||
---|---|---|---|---|---|---|---|---|---|---|
oral | % | poster | % | p | oral | % | poster | % | p | |
RCT | 9 | 7 | 4 | 3 | 0.268 | 7 | 5 | 2 | 2 | 0.325 |
non RCT | 87 | 63 | 74 | 61 | 0.755 | 101 | 66 | 68 | 68 | 0.927 |
Observational | 77 | 56 | 47 | 39 | 0.006* | 98 | 64 | 64 | 64 | 0.939 |
Other (Video, Case report, Systematical Review, Describing op/new technik) | 10 | 7 | 27 | 22 | < 0.001* | 3 | 2 | 4 | 4 | - |
Experimental | 42 | 30 | 39 | 32 | 0.478 | 44 | 29 | 30 | 30 | 0.727 |
Drop Out | 0 | 0 | 4 | 3 | 0.046* | - | - | - | - | - |
Total | 138 | 121 | 152 | 100 |