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Table 3 Average ages of the study subjects, according to research phase and motivator (N=79)

From: Motives for participating in a clinical research trial: a pilot study in Brazil

  N Age (average) CI 95% P-value1
     <0.0001
Phase I 39 32 28.7 - 34.8  
Phase III 40 53 49.1 - 56.0  
  1. Using Student’s t-test.