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Table 1 Mean sample size, effect size (ES), absolute effect size, and IF, by categories of funding and reported COIs

From: The effect of journal impact factor, reporting conflicts, and reporting funding sources, on standardized effect sizes in back pain trials: a systematic review and meta-regression

   N (%) Sample size (SD) ES (mean) abES (mean) IF (mean)
COI       
  None reported 70 (71) 149.9 (247.0) 0.389 0.67 3.144
  Reported none 22 (22) 126.5 (177.1) 0.291 0.78 3.458
  Reported some 7 (7) 214.6 (125.1) 0.409 0.41 6.001
Funding       
  None reported 35 (35) 61.8 (31.5) 0.324 0.53 2.004
  Reported none 11 (11) 87.8 (42.4) 0.499 1.43 2.155
  Reported some 53 (54) 219.9 (277.6) 0.371 0.62 4.102
  1. P<0.05 (compared to none reported)
  2. P=0.001 (compared to none reported)