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Table 2 Distribution of the reporting quality variables and median of the number of citations received by the publishing journal.

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                < 0.001
▪not stated 18 (20.0) 50.5 38 (28.1) 32 78 (42.4) 19.5 21 (53.8) 1 155 (34.6)  
▪stated 72 (80.0) 73.5 97 (71.9) 33 106 (57.6) 20.5 18 (46.2) 1 293 (65.4)  
Primary outcome                0.004
▪not stated 20 (22.2) 49.5 28 (20.7) 36 45 (24.5) 20 19 (48.7) 0 112 (25.0)  
▪stated 70 (77.8) 74 107 (79.3) 32 139 (75.5) 20 20 (51.3) 1.5 336 (75.0)  
Sample size                0.047
▪not reported 12 (13.3) 58 16 (11.9) 33.5 42 (22.8) 16 8 (20.5) 1 78 (17.4)  
▪reported 78 (86.7) 65.5 119 (88.1) 33 142 (77.2) 23 31 (79.5) 1 370 (82.6)  
Incomplete description of procedures                < 0.001
▪yes 7 (7.8) 63 21 (15.6) 24 a 66 (35.9) 16 b 19 (48.7) 1 113 (25.2)  
▪no 83 (92.2) 65 114 (84.4) 34 118 (64.1) 24 20 (51.3) 0.5 335 (74.8)  
All 90    135    184    39    448   
  1. The statistical significance of differences of the medians between variable categories was tested with Mann-Whitney U test. The two with p < 0.05 are in bold.
  2. a p-value of Mann-Whitney U test is 0.020.
  3. bp-value of Mann-Whitney U test is 0.039.