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Table 7 Number of abstracts in each sub-category for population treatment for 336 primary RCT abstracts (R1)

From: Are decision trees a feasible knowledge representation to guide extraction of critical information from randomized controlled trial reports?

  single patient group randomized (P1) single patient group randomized, additional control group (P2) more than one patient group randomized (P3)
Number of abstracts 320 11 5