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Table 2 Number and funding source of papers and individual trials following level 2 exclusion criteria application

From: Sponsorship bias and quality of randomised controlled trials in veterinary medicine

  Number of cat papers (trials) Number of dog papers (trials) Number of horse papers (trials) Number of cattle papers (trials) Number of sheep papers (trials) Total number of papers (trials, % of total trials)
Papers including pharmaceutical agent RCTs 17 49 28 61 17 172
Papers excluded from analysisa 9 21 17 29 10 86
Papers analysed 8 (9 trials) 28 (44 trials) 11 (11 trials) 32 (36 trials) 7 (26 trials) 86 (126 trials)
Funding sources of analysed papers
Pharmaceutical company funded/pharmaceutical company involvement 4 (5 trials) 17 (33 trials) 4 (4 trials) 20 (23 trials) 2 (21 trials) 47 (86 trials; 68.3%)
Non pharmaceutical funding stated 3 (3 trials) 4 (4 trials) 2 (2 trials) 6 (7 trials) 3 (3 trials) 18 (19 trials; 15.1%)
No funding stated 1 (1 trial) 7 (7 trials) 5 (5 trials) 6 (6 trials) 2 (2 trials) 21 (21 trials; 16.7%)
  1. Included studies are the pharmaceutical agent RCTs. aSee Additional Table 1 for reasons for exclusions from analysis. There was no statistical difference (p = 0.53) between funding sources between companion animal species (cats, dogs and horses) and farm animal species (cows and sheep)