Table 1 Record characteristics reported by significance of effect estimate.: non-significant (n = 234) and significant (n = 1101). The distribution of articles by specialty of journal, study type (in-vitro, interventional, observational) and significance of results are shown in Fig. 2
Variable | Non-significant N (%) | Significant N (%) |
|---|---|---|
Journal title | ||
JDR | 2 (2.2) | 90 (97.8) |
JADA | 2 (6.1) | 31 (93.9) |
EJO | 18 (32.1) | 38 (67.9) |
AJODO | 22 (22.9) | 74 (77.1) |
JCP | 26 (27.7) | 68 (72.3) |
JOP | 24 (13.3) | 156 (86.7) |
JOE | 18 (13.3) | 117 (86.7) |
IJOMS | 40 (28.2) | 102 (71.8) |
JOMS | 38 (15.8) | 203 (84.2) |
PD | 5 (25.0) | 15 (75.0) |
EJPD | 4 (19.0) | 17 (81.0) |
JPD | 26 (15.3) | 144 (84.7) |
JOPR | 9 (16.4) | 46 (83.6) |
Specialty Journal | ||
General oral health journals | 4 (3.2) | 121 (96.8) |
Orthodontics | 40 (26.3) | 112 (73.7) |
Periodontology | 50 (18.2) | 224 (81.8) |
Endodontics | 18 (13.3) | 117 (86.7) |
Oral and Maxillofacial surgey | 78 (20.4) | 305 (79.6) |
Pedatrics | 9 (22.0) | 32 (78.0) |
Prosthodontics | 35 (15.6) | 190 (84.4) |
Continent of corresponding author | ||
Europe | 72 (23.5) | 235 (76.5) |
Americas | 80 (17.1) | 389 (82.9) |
Asia or other | 82 (14.7) | 477 (85.3) |
Study type | ||
In-vitro | 42 (9.2) | 417 (90.8) |
Interventional | 91 (32.9) | 186 (67.1) |
Observational | 101 (16.9) | 498 (83.1) |
Ethical approval | ||
Not reported | 43 (13.0) | 287 (87.0) |
Approval obtained | 191 (19.0) | 814 (81.0) |
Involvement of statistician | ||
No | 212 (17.2) | 1020 (82.8) |
Yes | 22 (21.4) | 81 (78.6) |
Study registration | ||
No | 180 (14.8) | 1034 (85.2) |
Yes | 54 (44.6) | 67 (55.4) |
Conflict of interest | ||
No | 226 (17.6) | 1059 (82.4) |
Yes | 8 (16.0) | 42 (84.0) |