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Table 2 Authorship characteristics of included studies (nā€‰=ā€‰217)

From: Collaboration in orthodontic clinical trials: prevalence and association with sample size and funding

Number of authors in each study

Number of studies

1ā€“2

nā€‰=ā€‰15

3ā€“6

nā€‰=ā€‰160

7ā€“9

nā€‰=ā€‰37

>ā€‰9

nā€‰=ā€‰5

Institutions of authors

Number of authors

Community-based

nā€‰=ā€‰4

Non-university hospital

nā€‰=ā€‰61

University hospital

nā€‰=ā€‰930

Practice-based

nā€‰=ā€‰56

Other

nā€‰=ā€‰5

No information

nā€‰=ā€‰26