Table I.
Comparison of publications between 1997 and 2007
| 1997 | 2007 | P-value | |
|---|---|---|---|
| Publications | 219 | 352 | |
| International (% of publications) | 46 (21%) | 115 (33%) | 0.003* |
| U.S. | 173 | 237 | |
| Authors | 821 | 1621 | |
| Authors per publication | 3.8 ± 1.7 | 4.6 ± 2.0 | < 0.001* |
| MD Authorsλ (% of all authors) | 662 (81%) | 1303 (80%) | 0.91 |
| International (% of MD) | 191 (29%) | 566 (43%) | < 0.001* |
| U.S. | 471 | 737 | |
| MDs not found in ABOS database (including other specialties) (% of U.S. MD) | 112 (24%) | 184 (25%) | 0.68 |
| Orthopaedic attendings (% of U.S. MD) | 326 (69%) | 481 (65%) | 0.17 |
| Orthopaedic residents (% of U.S. MD) | 58 (12%) | 132 (18%) | 0.01* |
| Non-MD Authorsλ (% of all authors) | 157 (19%) | 326 (20%) | 0.59 |
| PhD, ScD, DVM, or DDS (% of non-MD) | 75 (48%) | 145 (45%) | 0.50 |
| Bachelor’s degree (% of non-MD) | 35 (22%) | 82 (25%) | 0.57 |
*
= statistically significant
λ
= authors with multiple degrees were only counted once. Any patient with an MD or equivalent was considered an MD author; in all other cases, the highest educational degree was selected.
Abbreviations: JBJS = Journal of Bone and Joint Surgery; U.S. = United States; MD = doctor of medicine; ABOS = American Board of Orthopaedic Surgery; PhD = doctor of philosophy; ScD = doctor of science; DVM = doctor of veterinary medicine; DDS = doctor of dental surgery