From: The relationship between quality of research and citation frequency
 | AGP | AJP | BJP | NJP | Total | P-value of chi square test | |||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
 | N | (%) | Md | N | (%) | Md | N | (%) | Md | N | (%) | Md | N | (%) |  |
Research question | Â | Â | Â | Â | Â | Â | Â | Â | Â | Â | Â | Â | Â | Â | < 0.001 |
â–ªnot stated | 18 | (20.0) | 50.5 | 38 | (28.1) | 32 | 78 | (42.4) | 19.5 | 21 | (53.8) | 1 | 155 | (34.6) | Â |
â–ªstated | 72 | (80.0) | 73.5 | 97 | (71.9) | 33 | 106 | (57.6) | 20.5 | 18 | (46.2) | 1 | 293 | (65.4) | Â |
Primary outcome | Â | Â | Â | Â | Â | Â | Â | Â | Â | Â | Â | Â | Â | Â | 0.004 |
â–ªnot stated | 20 | (22.2) | 49.5 | 28 | (20.7) | 36 | 45 | (24.5) | 20 | 19 | (48.7) | 0 | 112 | (25.0) | Â |
â–ªstated | 70 | (77.8) | 74 | 107 | (79.3) | 32 | 139 | (75.5) | 20 | 20 | (51.3) | 1.5 | 336 | (75.0) | Â |
Sample size | Â | Â | Â | Â | Â | Â | Â | Â | Â | Â | Â | Â | Â | Â | 0.047 |
â–ªnot reported | 12 | (13.3) | 58 | 16 | (11.9) | 33.5 | 42 | (22.8) | 16 | 8 | (20.5) | 1 | 78 | (17.4) | Â |
â–ªreported | 78 | (86.7) | 65.5 | 119 | (88.1) | 33 | 142 | (77.2) | 23 | 31 | (79.5) | 1 | 370 | (82.6) | Â |
Incomplete description of procedures | Â | Â | Â | Â | Â | Â | Â | Â | Â | Â | Â | Â | Â | Â | < 0.001 |
â–ªyes | 7 | (7.8) | 63 | 21 | (15.6) | 24 a | 66 | (35.9) | 16 b | 19 | (48.7) | 1 | 113 | (25.2) | Â |
â–ªno | 83 | (92.2) | 65 | 114 | (84.4) | 34 | 118 | (64.1) | 24 | 20 | (51.3) | 0.5 | 335 | (74.8) | Â |
All | 90 | Â | Â | 135 | Â | Â | 184 | Â | Â | 39 | Â | Â | 448 | Â | Â |